1	"Annual, not cespitose, not mat-forming"	2
1	"Perennial herb, cespitose to mat-forming"	6
2	"Inflorescence +- glandular-hairy; leaf (5)10--30 mm; seed 1.3--2 mm"	3
2	"Inflorescence glabrous; leaf 1.5--7(10) mm; seed 0.4--1 mm"	4
3	"Leaves +- evenly spaced, thread-like, generally 0.3 mm wide, flexible, becoming curled; seeds red-brown, margin thin, wing-like"	"Minuartia douglasii"
3	"Leaves mostly near base, lance-linear, 1--1.5(2.5) mm wide, rigid, recurved; seeds brown to black-brown, margin thick, not wing-like"	"Minuartia howellii"
4	"Petals < sepals or 0; plants 1--5 cm; leaf, sepal vein generally 1, often faint"	"Minuartia pusilla"
4	"Petals 1--1.8 &times; sepals; plants generally 5--25 cm; leaves, sepals with veins +- 3, faint, or ribs 3 or 5, prominent"	5
5	"Petals 1.5--1.8 &times; sepals; sepal veins 3, faint, lateral pair rarely extending to tip"	"Minuartia californica"
5	"Petals 1--1.3 &times; sepals; sepal ribs 3 or 5, prominent, lateral pair converging with midrib at tip"	"Minuartia cismontana"
6	"Sepal tip narrowly rounded, margin incurved"	"Minuartia obtusiloba"
6	"Sepal tip acute to acuminate, margin not incurved"	7
7	"Plant +- densely cespitose, stem decumbent to erect; taproot < 1.5 mm diam"	8
7	"Plant mat-forming, rhizomes elongate and stem or stolons trailing; taproot > 3 mm diam"	9
8	"Petals +- 0.8--1 &times; sepals; plant glandular-hairy"	"Minuartia rubella"
8	"Petals 0; plant glabrous"	"Minuartia stricta"
9	"Plant densely glandular-hairy"	10
9	"Plant generally glabrous or +- sparsely glandular-hairy especially in inflorescence; stem, leaves +- glabrous"	12
10	"Leaf recurved; sepal ribs (1)3, +- equally prominent"	"Minuartia nuttallii var. fragilis"
10	"Leaf straight or +- recurved; sepal ribs 1 or 3, lateral pair 0 or less prominent"	11
11	"Petals 0.7--0.9 &times; sepals; KR, CaRH, SNH, SnGb, SNE"	"Minuartia nuttallii var. gracilis"
11	"Petals 1.1--1.6 &times; sepals; NW, CaRH, c SNH, Wrn"	"Minuartia nuttallii var. gregaria"
12	"Sepals 5--6 mm, in flower generally 3-ribbed; petals 0.7--0.9 &times; sepals"	"Minuartia decumbens"
12	"Sepals 2.5--4.8 mm, in flower faintly 1--3-veined; petals 1.4--2.2 &times; sepals"	13
13	"Plant glaucous; flower stem from branching rhizomes; leaves > internodes; axillary leaves well developed"	"Minuartia rosei"
13	"Plant gray-green; flower stem from stolons; leaves often < internodes; axillary leaves weakly developed"	"Minuartia stolonifera"