1 "Stem basally jointed, breaking into short-cylindric sections; flowers 150--200 --- n DMtns (subg. Clastomyelon)" "Eriogonum intrafractum"
1 "Stem not jointed, not breaking into sections; flowers 7--100" 2
2 "Flowers with dense coarse, curved, +- white hairs; leaves generally coarse-hairy on both surfaces; GB, D (subg. Ganysma)" "Eriogonum inflatum"
2 "Flowers glabrous or not as above; leaves tomentose to sparsely so at least abaxially, not coarse-hairy" 3
3 "Flower stipe +- winged" 4
3 "Flower stipe 0" 5
4 "Flowers bright yellow; inflorescence cyme- or umbel-like, 0.5--3 cm; fruit 2.5--3 mm; s WTR" "Eriogonum crocatum"
4 "Flowers white to rose or +- yellow; inflorescence cyme-like, 10--25 cm; fruit 3.5--4 mm; s SN, CW, SW, SNE, DMtns" "Eriogonum saxatile"
5 "Plant forming cespitose or cushion-like mat; inflorescence head-like, if not then plant 0.1--1 dm" 6
5 "Shrub to subshrub or spreading to erect herb; inflorescence branched, if head-like then plant 1--5 dm" 30
6 "Inflorescence branched" 7
6 "Inflorescence head-like" 10
7 "Flowers glandular-hairy, +- white to +- red; stem generally glandular-hairy; s SNH" 8
7 "Flowers glabrous, white to pink or rose or +- yellow with +- red spot; stem not glandular; s SNH, n DMtns" 9
8 "Stem erect; inflorescence umbel-like (head-like)" "Eriogonum breedlovei var. breedlovei"
8 "Stem suberect to prostrate; inflorescence cyme-like" "Eriogonum breedlovei var. shevockii"
9 "Flowers 3.5--5 mm, lobes not alike, outer round; involucres 1.5--2 mm; n DMtns" "Eriogonum gilmanii"
9 "Flowers (1.5)2--2.5 mm, lobes alike; involucres 0.8--1.7(2) mm; s SNH" "Eriogonum wrightii var. olanchense"
10 "Perianth lobes not alike, outer generally 2 × as wide as inner; stems sparsely to densely tomentose or +- glabrous --- KR, CaR, SNH, SnBr, GB" 11
10 "Perianth lobes alike, if not then stems glandular-hairy" 20
11 "Leaf blades generally 1--6 cm (or shorter); stem (1)5--30(40) cm; involucres (3.5)4--6.5(8) mm" 12
11 "Leaf blades 0.2--1.2 (2) cm; stem generally 0.3--5(9) cm (or longer); involucres generally 2--4.5(8) mm" 15
12 "Stem generally 1--5(7.5) cm; --- leaf blades densely tomentose; n SNH (Job's Peak, Alpine Co.)" "Eriogonum ovalifolium var. eximium"
12 "Stem generally (4)7--30(40) cm (or shorter)" 13
13 "Flowers 5--7 mm; involucres 5--7 mm; rare, ne SnBr" "Eriogonum ovalifolium var. vineum"
13 "Flowers 4--5 mm; involucres 4--6.5 mm; common, not SnBr" 14
14 "Flowers yellow; SNH, GB" "Eriogonum ovalifolium var. ovalifolium"
14 "Flowers white to rose or purple; KR, CaRH, SNH, GB" "Eriogonum ovalifolium var. purpureum"
15 "Flowers yellow --- c SNH" "Eriogonum ovalifolium var. caelestinum"
15 "Flowers white, rose, purple or red" 16
16 "Leaf blades densely tomentose, margins +- brown --- n SNH (Job's Peak, Alpine Co.)" "Eriogonum ovalifolium var. eximium"
16 "Leaf blades tomentose to densely so, margins not +- brown" 17
17 "Involucres 3--4.5 mm" 18
17 "Involucres 5--8 mm --- s SNH or ne SnBr" 19
18 "Leaf blades tomentose, to sparsely so adaxially; rare, MP" "Eriogonum ovalifolium var. depressum"
18 "Leaf blades tomentose to densely so on both surfaces; common, CaRH, SNH, W&I" "Eriogonum ovalifolium var. nivale"
19 "Leaf blades tomentose to sparsely so; s SNH" "Eriogonum ovalifolium var. monarchense"
19 "Leaf blades densely tomentose; ne SnBr" "Eriogonum ovalifolium var. vineum"
20 "Flowers yellow or red-yellow" 21
20 "Flowers white to rose or pink" 23
21 "Involucres glandular and sparsely hairy; stem glandular-hairy; n&c SNH, n SNE" "Eriogonum rosense var. rosense"
21 "Involucres glabrous or sparsely tomentose, occasionally glandular; stem glabrous or glandular; MP" 22
22 "Leaf blades obovate or not, 1--2 cm, (0.3)0.5--1(1.5) cm wide; stem 0.5--1.5(2) dm, glandular below inflorescence; involucres sparsely tomentose, occasionally sparsely glandular" "Eriogonum ochrocephalum var. ochrocephalum"
22 "Leaf blades not obovate, 0.3--1(1.4) cm, 0.15--0.4(0.6) cm wide; stem 0.2--0.6(0.8) dm, glabrous; involucres glabrous or sparsely tomentose" "Eriogonum prociduum"
23 "Involucres sparsely glandular to glandular-hairy or hairy, pliable; c&s SNH, n W&I" "Eriogonum gracilipes"
23 "Involucres glabrous or tomentose, rigid; c&s SN, Teh, TR, SNE, n DMtns" 24
24 "Fruit tomentose; SNE, n DMtns (Last Chance Range)" "Eriogonum shockleyi var. shockleyi"
24 "Fruit glabrous; c&s SN, Teh, TR, SNE, nw DMtns" 25
25 "Pedicels hairy; leaves (1)2--5 cm, 0.8--2 cm wide; plant 3--10(11) dm diam; Teh" "Eriogonum callistum"
25 "Pedicels glabrous; leaves 0.2--1(1.2) cm, 0.05--0.4 cm wide; plant 1--4 dm diam; c&s SN, TR, SNE, nw DMtns" 26
26 "Leaf hairs white; plant forming dense mat; c&s SN, SNE, nw DMtns" "Eriogonum kennedyi var. purpusii"
26 "Leaf hairs gray- or red- to brown-white; plant generally forming loose, open mat; se SNF, TR" 27
27 "Leaf blades oblong, 0.3--0.5 cm, 0.1--0.4 cm wide; se SNF" "Eriogonum kennedyi var. pinicola"
27 "Leaf blades oblanceolate to elliptic, 0.2--1.2 cm, 0.05--0.2 cm wide; TR" 28
28 "Stem 0.5--2(3) cm; SnGb, SnBr" "Eriogonum kennedyi var. alpigenum"
28 "Stem 4--15 cm; n WTR, SnBr" 29
29 "Stem sparsely tomentose; involucres 2.5--4 mm" "Eriogonum kennedyi var. austromontanum"
29 "Stem glabrous; involucres 1.5--2.5 mm" "Eriogonum kennedyi var. kennedyi"
30 "Involucres clustered 2--10+ per node" 31
30 "Involucres 1 per node" 69
31 "Perianth lobes not alike" 32
31 "Perianth lobes alike" 34
32 "Flowers yellow --- CaR, ne SN, MP" "Eriogonum strictum var. anserinum"
32 "Flowers white to rose or purple" 33
33 "Leaf hairs white, densely tomentose to tomentose; KR" "Eriogonum strictum var. greenei"
33 "Leaf hairs +- gray or +- green, tomentose to sparsely so; KR, n NCoRO, NCoRH, CaR, ne SNH, w MP" "Eriogonum strictum var. proliferum"
34 Herb 35
34 Shrub 60
35 "Leaf blades lanceolate to narrowly ovate, 4--15(25) cm, long-soft-hairy" 36
35 "Leaf blades oblanceolate to ovate or elliptic, generally 2--6 cm, tomentose abaxially, tomentose to glabrous adaxially" 37
36 "Stem, inflorescence glabrous; n California" "Eriogonum elatum var. elatum"
36 "Stem, inflorescence long-soft-hairy; KR, CaR, n SN, MP" "Eriogonum elatum var. villosum"
37 "Involucres 3--6 mm wide; stem, inflorescence glabrous (to sparsely tomentose); inflorescence +- head- to cyme-like; leaf blades densely tomentose abaxially, tomentose to +- glabrous adaxially; ChI" 38
37 "Involucres (1.5)2--4 mm wide; stem, inflorescence glabrous to tomentose; inflorescence head- to umbel- or cyme-like; leaf blades tomentose to densely so on both surfaces, or tomentose to glabrous adaxially; mainland" 40
38 "Flowers pink to red or rose; plant 2--5 dm; involucres 5--7 mm; Santa Rosa, San Miguel, Santa Cruz islands, occasionally CW" "Eriogonum grande var. rubescens"
38 "Flowers white; plant 1--15 dm; involucres 4--6 mm; various islands except Santa Rosa Island" 39
39 "Plant 5--15 dm; involucres 5--6 mm; San Miguel, Santa Cruz, Anacapa, Santa Catalina, San Clemente islands, occasionally CW" "Eriogonum grande var. grande"
39 "Plant 1--2(2.5) dm; involucres 4--5 mm; San Nicolas Island" "Eriogonum grande var. timorum"
40 "Pedicels hairy; flowers densely hairy --- Teh" "Eriogonum callistum"
40 "Pedicels glabrous; flowers glabrous or hairy" 41
41 "Involucres, stems tomentose to (glabrous); leaf blades densely white- to yellow-brown-tomentose on both surfaces, or tomentose to glabrous adaxially; subshrub or mat --- NCo, n&c CCo" "Eriogonum latifolium"
41 "Involucres, stems glabrous, if tomentose then plant not in NCo, n&c CCo; leaf blades tomentose to densely so on both surfaces or tomentose to glabrous adaxially; plant generally erect" 42
42 "Involucres, inflorescence branches tomentose to sparsely so; leaves generally basal" 43
42 "Involucres, inflorescence branches glabrous, if not then leaves sheathing" 44
43 "Flowers white to rose or yellow; stem tomentose to hairy; leaf blades 2--4 cm; NW, CaR, n SN" "Eriogonum nudum var. oblongifolium"
43 "Flowers white; stem densely tomentose (to tomentose); leaf blades 2--3.5 cm; s SNF" "Eriogonum nudum var. regirivum"
44 "Leaves sheathing, margins generally strongly wavy" 45
44 "Leaves basal, margins not or +- wavy" 51
45 "Stems tomentose" 46
45 "Stems glabrous" 48
46 "Flowers hairy, 1.5--2 mm; involucres 3--4 mm; s SNF" "Eriogonum nudum var. regirivum"
46 "Flowers glabrous, 2--4 mm; involucres 3--6 mm; SnFrB" 47
47 "Leaf blades (1)3--8 cm, (1)2--4 cm wide, sheathing 1--5(10) cm; c SnFrB" "Eriogonum nudum var. auriculatum"
47 "Leaf blades 1--3 cm, 1--1.5 cm wide, sheathing 5--20 cm; s SnFrB" "Eriogonum nudum var. decurrens"
48 "Leaf blades densely tomentose abaxially, tomentose adaxially; involucres 5--10; s SNF" "Eriogonum nudum var. murinum"
48 "Leaf blades tomentose abaxially, less so to glabrous adaxially; involucres 1--5; NW, deltaic GV (Contra Costa Co.), CW" 49
49 "Involucres solitary; stem inflated; flowers white to yellow, glabrous; e SCoRI" "Eriogonum nudum var. indictum"
49 "Involucres 1--5 on same pl; stem not or +- inflated; flowers white to pink (or +- yellow), glabrous or hairy; NW, deltaic GV (Contra Costa Co.), CW" 50
50 "Involucres (2)3--5 per cluster; stem not or +- inflated; flowers white to pink (or +- yellow), glabrous; NW, CW" "Eriogonum nudum var. auriculatum"
50 "Involucres 1--3; stem not inflated; flowers white to pink, hairy; deltaic GV (Contra Costa Co.)" "Eriogonum nudum var. psychicola"
51 "Involucres 1(2)" 52
51 "Involucres 2--10" 55
52 "Stem inflated; flowers yellow (or white) --- s SN, Teh, s CW, TR, s SNE, w DMoj" "Eriogonum nudum var. westonii"
52 "Stem not inflated, if so then plant of PR; flowers white (or yellow)" 53
53 "Flowers hairy (or glabrous); TR, PR" "Eriogonum nudum var. pauciflorum"
53 "Flowers glabrous; NW, CaR, SN, SnFrB, GB" 54
54 "Leaf blades 1--2 cm; SNH, GB" "Eriogonum nudum var. deductum"
54 "Leaf blades 1--5 cm; NW, CaR, SN, SnFrB" "Eriogonum nudum var. nudum"
55 "Flowers hairy, generally yellow" 56
55 "Flowers generally glabrous, white (or yellow)" 57
56 "Stem not inflated; leaf blades glabrous or woolly-tufted adaxially, margins flat; NW, CaR, SN, ScV, SnFrB" "Eriogonum nudum var. pubiflorum"
56 "Stem +- to distinctly inflated; leaf blades tomentose to sparsely so adaxially, margins wavy; s SNE, w DMoj" "Eriogonum nudum var. westonii"
57 "Inflorescence generally head-like or +- so; alpine, c&s SNH" "Eriogonum nudum var. scapigerum"
57 "Inflorescence cyme-like, if head-like or +- so then not alpine" 58
58 "Involucres 5--7 mm, 1(2); TR, PR" "Eriogonum nudum var. pauciflorum"
58 "Involucres 3--5 mm, 2--10; NW, CaR, SN, SnFrB" 59
59 "Inflorescence cyme-like, branched 2+ times; involucres 2--5; NW, CaR, SN, SnFrB" "Eriogonum nudum var. nudum"
59 "Inflorescence head- or cyme-like, branched 1--2 times; involucres 5--10; n NCo" "Eriogonum nudum var. paralinum"
60 "Leaf blades narrowly linear to oblanceolate, <= 2 cm, generally strongly clustered; widespread" 61
60 "Leaf blades linear-oblong to round, if linear then > 2 cm and not clustered; CW, SW" 64
61 "Leaves thinly white-tomentose abaxially, glabrous adaxially; flowers, involucres generally glabrous; plant generally decumbent; CCo" "Eriogonum fasciculatum var. fasciculatum"
61 "Leaves, flowers, involucres hairy, if +- glabrous then plant of deserts; plant erect to rounded; CA-FP, SNE, D" 62
62 "Leaves light yellow-green, glabrous or +- so adaxially; involucres, flowers glabrous or occasionally hairy; D" "Eriogonum fasciculatum var. flavoviride"
62 "Leaves dark green or +- gray, generally hairy adaxially; involucres, flowers hairy; CA-FP, SNE, D" 63
63 "Inflorescence open, mostly cyme-like; leaves densely white-tomentose abaxially, less so to green, sparsely tomentose adaxially, margins generally tightly rolled under; CW, SW, occasionally NW, D" "Eriogonum fasciculatum var. foliolosum"
63 "Inflorescence head- to umbel-like (or cyme-like); leaves gray-hairy on both surfaces or densely gray-tomentose abaxially, gray-hairy adaxially, margins not or occasionally rolled under; s SN, SCoRI, e SCo, TR, e PR, SNE, D" "Eriogonum fasciculatum var. polifolium"
64 "Flowers glabrous; CCo, SCo" "Eriogonum parvifolium"
64 "Flowers long-soft-hairy; CCo, SCo, ChI, occasionally established elsewhere" 65
65 "Leaf blades linear to narrowly oblong, 2--4(5) cm, white-tomentose abaxially, gray-hairy to +- glabrous adaxially, margins rolled under; n ChI, occasionally established elsewhere" "Eriogonum arborescens"
65 "Leaf blades ovate or lanceolate to oblong- or narrow-ovate, 1.5--10 cm, white- or gray-tomentose generally on both surfaces, margins flat; CW, SW" 66
66 "Leaf blades ovate, 1.5--3 cm, 1--2.5(3) cm wide; inflorescence generally head-like; s CCo, w SCo, n ChI (Santa Rosa Island), occasionally established CW, SW" "Eriogonum cinereum"
66 "Leaf blades oblong-ovate to ovate or lanceolate to narrowly oblong, 2--7(10) cm, 1--5 cm wide; inflorescence generally open, cyme-like; s ChI, occasionally established CW, SW" 67
67 "Leaf blades lance-oblong to lanceolate; San Clemente Island" "Eriogonum giganteum var. formosum"
67 "Leaf blades oblong-ovate to ovate; Santa Catalina, Santa Barbara islands" 68
68 "Leaf blades 2.5--3.5(6) cm, 1.5--2(4) cm wide; inflorescence rarely open; Santa Barbara Island" "Eriogonum giganteum var. compactum"
68 "Leaf blades 3--7(10) cm, 2--5 cm wide; inflorescence open; Santa Catalina Island, occasionally CW, SW" "Eriogonum giganteum var. giganteum"
69 "Involucres in raceme-like arrangements at tips of inflorescence branches" 70
69 "Involucres in forks of branches" 81
70 "Involucres (4)6--7 mm; perennial herb, 6--12(18) dm --- c&s CW, SW" "Eriogonum elongatum var. elongatum"
70 "Involucres (0.8)1--6 mm; herb to shrub, (1)1.5--5 dm" 71
71 "Shrub --- s MP, SNE" "Eriogonum nummulare"
71 "Subshrub or herb" 72
72 "Plant basally +- woody, much-branched; leaf blades oblanceolate to elliptic, 0.1--1 cm wide, margins often rolled under" 73
72 "Plant basally not woody, little-branched; leaf blades round to widely ovate, (0.3)1--3.5(4) cm wide, margins flat --- W&I, DMtns" 79
73 "Involucres (4)5--6 mm; flowers (3)4--5 mm, cream to rose; n SCoRO" "Eriogonum butterworthianum"
73 "Involucres 0.7--4 mm; flowers 1.5--4 mm, white to pink or rose; widespread" 74
74 "Herb, loosely to compactly matted" 75
74 "Shrub or subshrub" 76
75 "Plant 0.1--0.3(0.6) dm; leaf blades 0.1--0.25 cm; involucres 0.8--1.7(2) mm; s SNH" "Eriogonum wrightii var. olanchense"
75 "Plant 0.5--2.5(3) dm; leaf blades 0.5--1(1.2) cm; involucres 1.5--4 mm; SN, CW, TR, e PR" "Eriogonum wrightii var. subscaposum"
76 "Stems, inflorescence +- gray, tomentose to densely so --- e PR, s DMoj, w DSon" "Eriogonum wrightii var. nodosum"
76 "Stems, inflorescence +- white, +- red, or +- green, tomentose to woolly-tufted" 77
77 "Petiole bases forming distinct ring around stem; leaf blades 0.2--0.6(1) cm, 0.1--0.3(0.4) cm wide; SW" "Eriogonum wrightii var. membranaceum"
77 "Petiole bases not forming ring around stem; leaf blades 0.5--3 cm, 0.2--1 cm wide; NW, s CaR, n SNF, DMoj" 78
78 "Leaf blades 1.5--3 cm, 0.5--1 cm wide; involucres 2--4 mm; flowers 2.5--4 mm; NW, s CaR, n SNF" "Eriogonum wrightii var. trachygonum"
78 "Leaf blades 0.5--1.5 cm, 0.2--0.5(0.7) cm wide; involucres 2--2.5 mm; flowers 2.5--3.5 mm; DMoj" "Eriogonum wrightii var. wrightii"
79 "Leaf blades +- round, (0.3)0.5--1.5 cm, petioles 1--2 cm; involucres bell-shaped" "Eriogonum mensicola"
79 "Leaf blades ovate to elliptic, oblong, or obovate, 1.5--4.5(5) cm, petioles 1--7 cm; involucres generally narrower than bell-shaped" 80
80 "Leaf blades ovate to elliptic or obovate, 1.5--4 cm, 1--2.5 cm wide, petioles 1--5 cm; involucres 3--5 mm, 2--4 mm wide" "Eriogonum panamintense"
80 "Leaf blades elliptic to oblong, (2)2.5--4.5(5) cm, 1.5--3.5(4) cm wide, petioles (2)3--7 cm; involucres 3--4 mm, 3--4 mm wide" "Eriogonum rupinum"
81 Herb 82
81 "Subshrub to shrub" 84
82 "Leaf blades ovate to elliptic or oblanceolate, (0.3)1--4 cm wide; California (see 41' above)" "Eriogonum nudum"
82 "Leaf blades round-ovate, 0.3--0.5(1) cm wide; n SNF" 83
83 "Stems erect to +- spreading" "Eriogonum apricum var. apricum"
83 "Stems prostrate" "Eriogonum apricum var. prostratum"
84 "Flowers hairy" 85
84 "Flowers glabrous" 87
85 "Flowers green-yellow to yellow; involucres 4-toothed --- s DSon" "Eriogonum deserticola"
85 "Flowers white; involucres 5--8-toothed" 86
86 "Involucres 3.5--5 mm; nw KR" "Eriogonum pendulum"
86 "Involucres 2--3 mm; CaRH" "Eriogonum spectabile"
87 "Inflorescence panicle- or cyme-like, generally extensively branched, generally open, not terminal; involucres glabrous" 88
87 "Inflorescence cyme-like, generally moderately branched, generally compact, terminal; involucres tomentose to glabrous" 94
88 "Outer perianth lobes obovate; inflorescence branches +- gray, generally spreading, tiered; D" "Eriogonum plumatella"
88 "Outer perianth lobes obovate to round; inflorescence branches green, ascending, not tiered; c&s SNH, Teh, s SCoR, TR, SNE, DMoj" 89
89 "Stems, inflorescence branches round or angled, minutely scabrous or papillate-scabrous; plant generally densely branched; DMtns" 90
89 "Stems, inflorescence branches round, not angled, generally smooth, glabrous or sparsely tomentose to woolly-tufted; plant sparsely branched; widespread" 91
90 "Stems, inflorescence branches round, glabrous or minutely scabrous" "Eriogonum heermannii var. argense"
90 "Stems, inflorescence branches sharply angled, deeply grooved, minutely scabrous" "Eriogonum heermannii var. sulcatum"
91 "Involucres not in raceme-like arrangement, or only uppermost 2--3 so disposed; inflorescence branches glabrous --- c&s SNH (e slope), SNE, n DMtns" "Eriogonum heermannii var. humilius"
91 "Involucres in raceme-like arrangement, at least at tips of branches; inflorescence branches glabrous or sparsely tomentose to woolly-tufted" 92
92 "Inflorescence sparsely tomentose to woolly-tufted; s California" "Eriogonum heermannii var. floccosum"
92 "Inflorescence branches glabrous; s-c, sw CA" 93
93 "Leaf blades 0.5--1.5 cm, glabrous to sparsely tomentose abaxially; inflorescence branches stout; s SNH (Kern Co.), Teh, se SCoRO (se San Luis Obispo Co.), n TR" "Eriogonum heermannii var. heermannii"
93 "Leaf blades 1.5--3(4) cm, generally tomentose to sparsely so abaxially (at least in early flower); inflorescence branches slender; c SCoRI" "Eriogonum heermannii var. occidentale"
94 "Plant matted subshrub, 0.5--1.5 dm; leaf blades 0.4--0.6 cm, margins rolled under; e DMtns" "Eriogonum thornei"
94 "Plant erect to spreading subshrub or shrub, 0.2--15 dm; leaf blades (0.3)1--3.5 cm, margins flat, or if rolled under; widespread" 95
95 "Flowers yellow" 96
95 "Flowers white, cream, orange, pink, or red" 97
96 "Leaf blades (0.2)0.3--0.6(0.8) cm wide; flowers (1.5)2--2.5(3) mm; involucres 2--2.5 mm; fruit 1.5--2 mm; SNH (e slope), GB" "Eriogonum microthecum var. ambiguum"
96 "Leaf blades 0.5--1.2 cm wide; flowers 2.5--3 mm; involucres 2.5--4 mm; fruit 2.5--3 mm; s MP" "Eriogonum microthecum var. schoolcraftii"
97 "Hairs +- white (see also Eriogonum microthecum var. alpinum) or stem, inflorescence rarely glabrous" 98
97 "Hairs +- brown or +- red (generally white in Eriogonum microthecum var. alpinum) or stems, inflorescence generally glabrous" 99
98 "Leaf margins flat; inflorescence sparsely tomentose or glabrous; SN, GB" "Eriogonum microthecum var. laxiflorum"
98 "Leaf margins generally rolled under; inflorescence tomentose to densely so or rarely subglabrous; s SNE, DMoj" "Eriogonum microthecum var. simpsonii"
99 "Shrub 3--6 dm" 100
99 "Subshrub 0.2--1.5(2) dm" 101
100 "Stems, inflorescence tomentose to densely so; flowers 2--2.5(3) mm; fruit 2.5--3 mm; e SnBr" "Eriogonum microthecum var. corymbosoides"
100 "Stems, inflorescence tomentose in youth, sparsely tomentose in age; flowers 1.5--2(2.5) mm; fruit 1.8--2 mm; s W&I, n DMtns" "Eriogonum microthecum var. panamintense"
101 "Leaf blades elliptic or ovate, margins flat; flowers (1.5)2--3.5(4) mm" 102
101 "Leaf blades linear or linear-oblanceolate to narrowly elliptic, margins often rolled under; flowers 1.5--2.5 mm" 103
102 "Leaf blades 0.5--1 cm, (0.2)0.3--0.5(0.6) cm wide; involucres (2)2.5--3 mm; flowers (2.5)3--3.5(4) mm; e SnGb, w SnBr" "Eriogonum microthecum var. johnstonii"
102 "Leaf blades 0.3--0.7(0.8) cm, 0.1--0.4 cm wide; involucres 2.5--3.5 mm; flowers (1.5)2--3.5 mm; s W&I" "Eriogonum microthecum var. lapidicola"
103 "Involucres (1.5)2--3 mm; flowers white to pink or rose; n&c SNH, n SNE" "Eriogonum microthecum var. alpinum"
103 "Involucres 3--4 mm; flowers cream; SnBr" "Eriogonum microthecum var. lacus-ursi"