1	"Fruit dehiscent, generally flat, generally +- entirely exserted from calyx body, straight or +- curved, generally with straight or curved, 0.5--1.5 mm beak; annual, per"	2
1	"Fruit indehiscent, generally not flat, generally included or +- exserted (sometimes exserted) from calyx body, curved most of length, generally with curved, 2--3 mm beak; generally per"	17
2	"Perennial herb (except <i>Acmispon strigosus</i>); fruit straight or +- curved; wings generally > keel; stigma +- glabrous or finely hairy"	3
2	"Annual; fruit generally straight; wings generally +- <= keel; stigma glabrous or puberulent"	9
3	"Annual, generally prostrate, mat-forming; inflorescence generally 1--2-flowered; corolla 5--10 mm; leaf axis flat, +- blade-like; fruit generally curved near tip"	"Acmispon strigosus"
3	"Perennial herb or shrub-like, prostrate (mat-forming or not) to erect; inflorescence 1--9-flowered; corolla 7--25 mm; leaf axis not flat or blade-like; fruit generally straight (or curved throughout, rarely only at or near tip)"	4
4	"Leaf axis including petiole 10--35 mm; leaflets 7--9, 1--2.2 cm, length 1.5--3 &times; width"	5
4	"Leaf axis including petiole 1--8 mm; leaflets 3--5, < 1 cm and/or length > 3 &times; width"	6
5	"Plant puberulent or soft-hairy; leaflets generally 1--1.5 cm"	"Acmispon grandiflorus var. grandiflorus"
5	"Plant +- glabrous, finely strigose, or puberulent; leaflets generally 1.6--2.2 cm"	"Acmispon grandiflorus var. macranthus"
6	"Shrub-like, ascending, (2)5--15 dm, finely strigose; corolla 12--24 mm"	"Acmispon rigidus"
6	"Perennial herb, prostrate or low-ascending, 1--3 dm, silvery-silky or gray-puberulent; corolla 6--12 mm"	7
7	"Stem generally prostrate, mat-forming; calyx lobes +- 2 mm; SnBr, SnJt, DMtns"	"Acmispon argyraeus var. argyraeus"
7	"Stem decumbent to low-ascending; calyx lobes 2--3 mm; DMtns"	8
8	"Leaflet oblanceolate to obovate, length +- 3--4 &times; width; New York Mtns"	"Acmispon argyraeus var. multicaulis"
8	"Leaflet obovate, length +- 2 &times; width; Providence Mtns"	"Acmispon argyraeus var. notitius"
9	"Flowers generally 1 per leaf axil; peduncle << 1 cm, bracts 0"	10
9	"Flowers 1--several per leaf axil; peduncle generally > 1 cm, generally bracted"	13
10	"Corolla white, pale yellow, or pink, often darkening in age; plant generally ascending to erect and calyx lobes < 2 &times; tube, or rarely prostrate and calyx lobes generally > 2 &times; tube"	11
10	"Corolla yellow, reddening in age; plant prostrate to low-ascending; calyx lobes 0.8--2 &times; tube"	12
11	"Plant generally 1--4 dm; calyx lobes +- 1.5 &times; tube"	"Acmispon denticulatus"
11	"Plant < 1 dm; calyx lobes +- 2 &times; tube"	"Acmispon rubriflorus"
12	"Calyx lobes 1--2 &times; tube; fruit generally 3--4 mm wide; plant generally with soft, spreading hairs"	"Acmispon brachycarpus"
12	"Calyx lobes +- 0.8--1.2 &times; tube; fruit generally 2.3--3 mm wide; plant +- strigose or hairs soft, spreading"	"Acmispon wrangelianus"
13	"Inflorescence generally 2--4-flowered (1st-formed often 1--2-flowered); leaflets 3--7, obovate to +- round, terminal generally largest"	14
13	"Inflorescence generally 1-flowered; leaflets 1--9, lanceolate to obovate, +- equal"	15
14	"Corolla 3.5--5 mm, keel > other petals; fruit 1--1.5 cm, becoming narrowed between seeds"	"Acmispon maritimus var. brevivexillus"
14	"Corolla 6--10 mm, keel +- = other petals; fruit 1.5--3 cm, not narrowed between seeds"	"Acmispon maritimus var. maritimus"
15	"Calyx lobes >> tube; leaflets generally 3 (upper leaves often simple)"	"Acmispon americanus var. americanus"
15	"Calyx lobes +- <= tube; leaflets 3--9"	16
16	"Stem ascending to erect; leaf axis sometimes +- flat; corolla pink or salmon, quickly fading; fruit straight, margin often wavy"	"Acmispon parviflorus"
16	"Stem prostrate, often mat-forming; leaf axis flat; corolla yellow; fruit generally curved near tip, margin not wavy"	"Acmispon strigosus"
17	"Annual, prostrate, decumbent, or ascending; young growth +- not hairy; corolla 3--7 mm; fruit exserted; SCoR, SW, generally s of Los Angeles"	18
17	"Perennial herb, shrub, prostrate to erect; young growth hairy if plant blooming 1st year or flowers < 7 mm; fruit included or exserted; widespread, including SW"	19
18	"Inflorescence +- sessile; s SCoR, SW"	"Acmispon micranthus"
18	"Inflorescence peduncled; s SCo (San Diego Co.)"	"Acmispon prostratus"
19	"Perennial herb, shrub; ChI"	20
19	"Perennial herb (except <i>Acmispon glaber</i>); mainland"	25
20	"Calyx shaggy-hairy; fruit included (except slowly elongating beak); leaf generally silvery-silky with fine, straight, ultimately wavy or tangled hairs"	21
20	"Calyx +- glabrous or strigose; fruit soon-exserted; leaf green or gray, sparsely or densely strigose or silky"	23
21	"Inflorescence peduncled, not crowded; calyx lobes 1.5--2.5 mm; stem prostrate to ascending"	"Acmispon argophyllus var. argenteus"
21	"Inflorescence +- sessile, crowded at stem tip; calyx lobes 2.5--5 mm; stem ascending to erect"	22
22	"Stem generally erect; leaves overlapping; calyx lobes +- 2.5--4 mm; s ChI (San Clemente Island)"	"Acmispon argophyllus var. adsurgens"
22	"Stem generally ascending; leaves not overlapping; calyx lobes 2.5--5 mm; n ChI (Santa Cruz Island)"	"Acmispon argophyllus var. niveus"
23	"Leaflets 3, densely strigose or +- silky, generally gray; n ChI (San Miguel Island)"	"Acmispon dendroideus var. veatchii"
23	"Leaflets 3--5, finely or sparsely strigose, green; ChI (except San Miguel Island)"	24
24	"Fruit 1--1.5 cm; peduncle bract 0; ChI (except San Miguel, San Clemente Islands)"	"Acmispon dendroideus var. dendroideus"
24	"Fruit 2.5--5 cm; peduncle bract generally pres; s ChI (San Clemente Island)"	"Acmispon dendroideus var. traskiae"
25	"Leaflets 3; inflorescence 1--3-flowered, +- sessile"	26
25	"Leaflets >= 3; inflorescence 2--15-flowered, sessile or peduncled"	29
26	"Leaflet 2--5 mm; fruit 6--9 mm; uncommon, se PR, sw DSon"	"Acmispon haydonii"
26	"Leaflet 4--15 mm; fruit 10--15 mm; widespread, including PR"	27
27	"Calyx glabrous (see couplet 31 for vars.)"	"Acmispon glaber"
27	"Calyx strigose"	28
28	"Corolla 9--12 mm; calyx 4--6 mm, lobes +- = tube; s SN"	"Acmispon procumbens var. jepsonii"
28	"Corolla 6--8 mm; calyx 2--3 mm, lobes << tube; not s SN"	"Acmispon procumbens var. procumbens"
29	"Leaflet glabrous or finely strigose, generally green; hairs straight or +- wavy"	30
29	"Leaflet hairy, green, gray, or silvery; hairs straight or wavy"	34
30	"Plants generally ascending to erect (some on immediate coast prostrate), bushy-branched, 5--20 dm; stem +- woody (yet green), sparsely leafy; corolla yellow; calyx lobes generally 1--2 mm, not curved outward; coastal and inland"	31
30	"Plants prostrate or low-ascending, < 10 dm; stem not woody, leafy; corolla pink-white or yellow; calyx lobes generally < 1 mm or curved outward; especially coastal"	32
31	"Keel prominent, > wings; corolla generally 8--9 mm; generally inland, SW, DSon"	"Acmispon glaber var. brevialatus"
31	"Keel not prominent, +- = wings; corolla 7--12 mm; coastal and inland, NCo, NCoR, n SNF, CCo, SnFrB, SCo, WTR, PR"	"Acmispon glaber var. glaber"
32	"Calyx lobes narrow, some or all curved outward or hooked; corolla generally white to +- pink (to brick-red when dry)"	"Acmispon cytisoides"
32	"Calyx lobes wide, straight, not hooked; corolla yellow"	33
33	"Peduncles 8--25 mm; stem often wiry, generally decumbent; fruit well exserted"	"Acmispon junceus var. biolettii"
33	"Peduncles 1--5 mm; stem generally stout, prostrate to ascending; fruit +- exserted"	"Acmispon junceus var. junceus"
34	"Stem, especially near tip, generally with spreading or obliquely directed, often straight, stiff hairs < 0.5 mm; corolla 4--6 mm; coastal and inland"	35
34	"Stem generally strigose or with +- spreading, often wavy hairs 0.2--0.4 mm; corolla 5--12 mm; especially inland"	36
35	"Corolla generally 4--5 mm; ovary generally finely strigose; SCo, SnBr, PR, DSon"	"Acmispon heermannii var. heermannii"
35	"Corolla generally 5--6 mm; ovary generally soft spreading-hairy; NCo, NCoRO, CCo, SCoRO"	"Acmispon heermannii var. orbicularis"
36	"Fruit exserted; leaflet hairs generally wavy, not obscuring surface; leaves gray or green"	37
36	"Fruit included or +- exserted; leaflet hairs generally straight, tangled in age, generally obscuring surface; leaves silky-silvery"	38
37	"Flowers generally 3--5 per inflorescence; calyx 6--7 mm, appearing blocky; banner abruptly upcurved 90&deg; TR, ne PR"	"Acmispon nevadensis var. davidsonii"
37	"Flowers generally 5--12 per inflorescence; calyx 5--10 mm, not appearing blocky; banner upcurved 30--90&deg; KR, NCoR, CaR, SN, CCo, SCo, w PR, DMtns"	"Acmispon nevadensis var. nevadensis"
38	"Inflorescence generally < 1 cm wide, 4--8-flowered; corolla 6--10 mm; especially c SN and s"	"Acmispon argophyllus var. argophyllus"
38	"Inflorescence often +- 1.5 cm wide, 10--15-flowered; corolla 8--12 mm; n SN"	"Acmispon argophyllus var. fremontii"