1	"Perennial herb, flowering 1st year or not --- GB, D"	"Eriogonum inflatum"
1	"Annual (per <i>Eriogonum inflatum</i> may key here if flowering 1st year)"	2
2	"Leaves basal and cauline, not basal only or basal and sheathing"	3
2	"Leaves basal and sometimes sheathing, not both basal and cauline"	14
3	"Involucres glandular-hairy or puberulent"	4
3	"Involucres glabrous, long-stiff or long-soft hairy, not glandular-hairy or puberulent"	8
4	"Perianth lobes alike, oblong to elliptic, not inflated"	5
4	"Perianth lobes not alike, outer elliptic to obovate or +- round, inflated or not, inner narrower"	6
5	"Involucre glandular-hairy, densely tomentose adaxially, 2.7--3 mm; flower 1.5--1.7 mm; s SNF, sw SnJV"	"Eriogonum gossypinum"
5	"Involucre not densely tomentose, 1.8--2 mm; flower 2--2.5 mm; s SN, SCoR, TR"	"Eriogonum gracillimum"
6	"Outer perianth lobes generally elliptic to obovate, not obviously inflated, if so then only basally; stamens exserted; c&s SNF, Teh, SnJV, CW, TR, s PR, w DMoj"	"Eriogonum angulosum"
6	"Outer perianth lobes elliptic to +- round or obovate, obviously inflated basally or at tip; stamens included; SnJV, SCoR, s SN, TR, GB, w DMoj"	7
7	"Outer perianth lobes inflated base to middle; involucres glandular-hairy; s SN, TR, GB"	"Eriogonum maculatum"
7	"Outer perianth lobes inflated above middle; involucres glandular; SnJV, SCoR, TR, w DMoj"	"Eriogonum viridescens"
8	"Flowers hairy, hairs hooked"	9
8	"Flowers glabrous, if hairy then hairs not hooked"	11
9	"Flowers 2, 0.8--1.1 mm; fruit tip exserted; NW, SN, n CW, TR"	"Eriogonum hirtiflorum"
9	"Flowers 4--6, 1.2--1.8 mm; fruit tip not exserted; s NCoR, c&s SN, Teh, CW, WTR"	10
10	"Involucres short-stiff hairy; c&s SN, Teh"	"Eriogonum inerme var. hispidulum"
10	"Involucres glabrous; s NCoR, CW, WTR"	"Eriogonum inerme var. inerme"
11	"Leaves sparsely tomentose or glabrous, oblong-oblanceolate to obovate; flowers densely short-hairy; plant glabrous or sparsely tomentose; s SNF, Teh, SCoRI, n WTR"	"Eriogonum ordii"
11	"Leaves short-hairy, linear; flowers glabrous or sparsely hairy; plant glabrous or glandular and short-hairy; NCoRH, CaRH, SN, n SCoRO, TR"	12
12	"Inflorescence internodes not glandular; plant prostrate to ascending --- s SNH"	"Eriogonum spergulinum var. pratense"
12	"Inflorescence internodes glandular; plant erect"	13
13	"Flower 1.5--2.5 mm; NCoRH, CaRH, SN, n SCoRO, TR"	"Eriogonum spergulinum var. reddingianum"
13	"Flower 2.5--3.5 mm; SN"	"Eriogonum spergulinum var. spergulinum"
14	"Leaf blades glabrous, or hairy on one or both surfaces, or if sparsely tomentose then flowers densely short-soft-hairy"	15
14	"Leaf blades tomentose to sparsely so on one or both surfaces; flowers glabrous, glandular, or variously hairy, but not short-soft-hairy"	24
15	"Flowers generally glabrous --- c SNH, SNE"	"Eriogonum esmeraldense var. esmeraldense"
15	"Flowers hairy"	16
16	"Flowers densely short-soft hairy or puberulent, white to pink or red (or +- yellow)"	17
16	"Flowers soft-shaggy- or coarse-hairy, white to +- pink or generally yellow"	19
17	"Leaf blades oblong-oblanceolate to obovate, sparsely tomentose or glabrous; stem glabrous to sparsely tomentose; s SNF, Teh, SCoRI, n WTR"	"Eriogonum ordii"
17	"Leaf blades oblanceolate to obovate, sparsely soft-shaggy hairy and glandular or coarse-hairy; stem glabrous and sparsely glandular; s SN, TR, PR, n W&I, sw DMtns"	18
18	"Flowers pink to red, aging to white, 0.5--0.9 mm; leaf blades coarse-hairy; involucres 0.5--0.9 mm; s SN, TR, PR, n W&I"	"Eriogonum parishii"
18	"Flowers white to +- red (or yellow), 1.5--2.5 mm; leaf blades soft-shaggy hairy, some glandular; involucres 1.2--1.5 mm; e SnBr, c&s PR, sw DMtns"	"Eriogonum apiculatum"
19	"Plant glandular throughout; flowers white to +- pink --- n&ne DMtns"	"Eriogonum glandulosum"
19	"Plant glabrous, except sometimes glandular or hairy near base or at nodes; flowers yellow to green-yellow or +- red"	20
20	"Stem glandular near base"	21
20	"Stem glabrous or basally coarse- or long-soft-hairy"	22
21	"Inflorescence glandular at lower nodes; involucre teeth (4)5; plant (0.3)0.5--3 dm; leaf blades generally +- round, (0.3)0.5--1(1.4) cm; fruit 1.5--1.8(2) mm; ne DMoj"	"Eriogonum contiguum"
21	"Inflorescence glabrous; involucre teeth 4; plant (2)4--18(22) dm; leaf blades round to reniform, (0.5)1--2.5(4) cm, (0.5)1--2(3) cm wide; fruit 2--2.5 mm; CW, SW, s SNE, D"	"Eriogonum clavatum"
22	"Stem, inflorescence +- gray; perennial herb but appearing annual when flowering 1st year --- GB, D"	"Eriogonum inflatum"
22	"Stem, inflorescence branches +- green or yellow-green; annual"	23
23	"Involucres 1--1.5(1.8) mm; plant (2)4--18(22) dm; inflorescence 30--150(170) cm; fruit 2--2.5 mm; CW, SW, s SNE, D"	"Eriogonum clavatum"
23	"Involucres 0.7--1 mm; plant 1--4.5(6) dm; inflorescence 5--30 cm; fruit 1--1.5 mm; D"	"Eriogonum trichopes"
24	"Outer perianth lobes generally oblong, obovate or round, cordate basally"	25
24	"Outer perianth lobes oblong to oblanceolate or ovate, truncate to obtuse basally"	31
25	"Involucres sessile and erect or on erect peduncles <= 0.5 cm --- DMoj"	26
25	"Involucres sessile and reflexed or on reflexed peduncles <= 1.5 cm"	27
26	"Stem 0.5--3 cm; plant 1--4 dm; inflorescence branches spreading"	"Eriogonum bifurcatum"
26	"Stem (5)10--20 cm; plant (0.5)3--6(10) dm; inflorescence branches +- erect"	"Eriogonum exaltatum"
27	"Stem, inflorescence glandular; SNE, DMoj"	"Eriogonum brachypodum"
27	"Stem, inflorescence glabrous; s SNH, Teh, s SnJV, TR, GB, D"	28
28	"Involucres widely bell-shaped; peduncles 0; flowers yellow to red-yellow; SNE"	"Eriogonum hookeri"
28	"Involucres narrowly obconic or narrowly bell-shaped; peduncles <= 1.5 cm; flowers white to pink; s SNH, Teh, s SnJV, TR, D"	29
29	"Involucres 1--1.5 mm; inflorescence of many horizontal tiers; ne DMoj"	"Eriogonum rixfordii"
29	"Involucres 1.5--2.5 mm; inflorescence not of many horizontal tiers; s SNH, Teh, s SnJV, TR, D"	30
30	"Involucres (2)2.5--3 mm; peduncles (0.3)0.5--1.5 cm; stem inflated; s SNH, Teh, s SnJV, TR, n&w DMoj"	"Eriogonum deflexum var. baratum"
30	"Involucres 1.5--2.5 mm; peduncles 0 or generally <= 0.5 cm; stem not inflated; D"	"Eriogonum deflexum var. deflexum"
31	"Flowers papillate basally --- peduncles curving, ascending, 1--5 cm; MP"	"Eriogonum collinum"
31	"Flowers smooth, not papillate"	32
32	"Perianth lobes alike"	33
32	"Perianth lobes not alike, if alike then glandular-hairy"	35
33	"Stems, inflorescence glandular; peduncles 0 or reflexed; flowers 2--2.5 mm"	"Eriogonum eremicola"
33	"Stems, inflorescence glabrous; peduncles erect; flowers 1.5--1.8 mm"	34
34	"Leaf margins flat, blades 2--4 cm wide; petioles 1--5 cm; plant 0.5--5 dm"	"Eriogonum hoffmannii var. hoffmannii"
34	"Leaf margins wavy, blades 3--8 cm wide; petioles (3)5--10 cm; plant 4--10 dm"	"Eriogonum hoffmannii var. robustius"
35	"Flowers glandular"	36
35	"Flowers glabrous"	39
36	"Flowers white to red, glandular-hairy with a tuft of long white hairs adaxially; e PR, s DMoj, DSon; outer perianth lobes generally fan-shaped"	"Eriogonum thurberi"
36	"Flowers yellow, if in age +- white then outer perianth lobes sac-like basally, glandular or short-stiff hairy, without a tuft of long white hairs adaxially; SCoRI, WTR, GB, D"	37
37	"Outer perianth lobes cordate, in age sac-like basally, initially yellow then white to rose; involucres 0.6--1.2 mm, glabrous; D"	"Eriogonum thomasii"
37	"Outer perianth lobes oblong-elliptic to obovate or ovate, not sac-like basally, yellow; involucres 1--2 mm, glabrous or glandular-hairy; SCoRI, WTR, GB, D"	38
38	"Involucres glandular-hairy; SCoRI, WTR, GB, D"	"Eriogonum pusillum"
38	"Involucres glabrous; D"	"Eriogonum reniforme"
39	"Peduncles 0 or reflexed; outer perianth lobes oblong; SNE"	"Eriogonum deflexum var. nevadense"
39	"Peduncles generally curving downward; outer perianth lobes +- fiddle-shaped or oblong to oval; n&c SNH, GB"	40
40	"Outer perianth lobes +- fiddle-shaped; peduncles glabrous (or 0); c SNH, GB, probably introduced in n SNH (Nevada Co.)"	"Eriogonum cernuum"
40	"Outer perianth lobes oblong to oval; peduncles glandular (glabrous); n SNH, n SNE"	41
41	"Peduncles glandular; n SNE"	"Eriogonum nutans var. nutans"
41	"Peduncles glabrous; n SNH (introduced but now extirpated)"	"Eriogonum nutans var. glabratum"