1 "Plant not prickly; flowers 1--2 on long pedicels; calyx lobes equal" 2
1 "Plant prickly, at least when dry; flowers several to many in heads; calyx lobes generally unequal" 7
2 "Corolla tube, throat minutely long-stalked-glandular abaxially; upper lvs entire; calyx lobes acuminate" 3
2 "Corolla tube, throat +- glabrous abaxially; upper lvs often palmate-lobed; calyx lobes gen acute" 5
3 "Corolla 6--8 mm, lobes blue-white; calyx densely glandular-puberulent; lvs ascending" "Navarretia capillaris"
3 "Corolla 8--21 mm, lobes pink; calyx sparsely glandular to subglabrous; lvs spreading" 4
4 "Corolla 8--15 mm, throat 2--5 mm, yellow, occ with short purple marks" "Navarretia leptalea subsp. bicolor"
4 "Corolla 13--21 mm, throat 6--8 mm, purple" "Navarretia leptalea subsp. leptalea"
5 "Corolla 4--9 mm; branches, pedicels ascending, +- straight; seeds dark brown" "Navarretia sinistra"
5 "Corolla 5--20 mm, if < 10 mm, branches gen ascending-spreading, +- straight, pedicels spreading, often curved; seeds medium brown" 6
6 "Corolla 5--10 mm, style incl" "Navarretia linearifolia subsp. linearifolia"
6 "Corolla 10--20 mm, style exserted" "Navarretia linearifolia subsp. pinnatisecta"
7 "Calyx lobes strap-shaped, wider at base than membranes; bract tip lobes 7--many; fruit dehiscing base upward, not to tip" 8
7 "Calyx lobes tapered, narrower at base than membranes; bract tip lobes generally 0--few; fruit dehiscing tip downward (if dehiscing upward, then only when wet)" 18
8 "Axis of upper leaves, often bracts expanded above middle; cotyledons 2--3, deeply 2-lobed" 9
8 "Axis of upper leaves, bracts not expanded above middle; cotyledons 2, entire" 13
9 "Corolla lobes white to cream, base purple-spotted" 10
9 "Corolla lobes blue to purple or light pink, base generally darker, without spots" 11
10 "Plant erect; corolla lobes rounded-acute; stamens, style included" "Navarretia gowenii"
10 "Plant spreading; corolla lobes acuminate; stamens, style exserted" "Navarretia ojaiensis"
11 "Corolla throat, upper tube purple" "Navarretia pubescens"
11 "Corolla throat, tube white" 12
12 "Plant spreading to ascending, central stem generally < branches; axis generally white-hairy, bracts glandular-hairy" "Navarretia mitracarpa"
12 "Plant erect, central stem generally > branches; axis, bracts puberulent or occasionally mid bract with narrow hairy band" "Navarretia setiloba"
13 "Corolla lobes purple, base spotted; fruit 8-valved" "Navarretia jepsonii"
13 "Corolla lobes yellow, cream, or white, base spotted or not, tip occasionally light blue; fruit 4-valved" 14
14 "Inflorescence puberulent, with longer hairs or not; corolla throat not spotted, lobes 4; style often long-exserted from flower bud" "Navarretia cotulifolia"
14 "Inflorescence white-hairy; corolla throat generally spotted, lobes 4--5; style included in flower bud" 15
15 "Corolla white (occasionally lobe tips blue), lobes 4 or 5; fruit 1--2 seeded" 16
15 "Corolla yellow, lobes 5; fruit 2--9 seeded" 17
16 "Corolla 8--12 mm, style exserted" "Navarretia eriocephala"
16 "Corolla 6--8 mm, style included" "Navarretia heterandra"
17 "Corolla 12--16 mm; herbage dark green" "Navarretia nigelliformis subsp. nigelliformis"
17 "Corolla 9--11 mm; herbage gray green" "Navarretia nigelliformis subsp. radians"
18 "Plant generally not glandular, stem hairs generally recurved or reflexed; fruit translucent, at least below middle, dehiscing when wetted, at base" 19
18 "Plant generally glandular, stem nonglandular hairs 0 or not recurved; fruit opaque, dehiscing at maturity, tip to base" 33
19 "Inner bracts concave-expanded at base; corolla lobes ovate" 20
19 "Inner bracts widely membranous-winged at base, not concave-expanded; corolla lobes linear or narrowly ovate" 25
20 "Bract tips with few to several fine spines; corolla lobes with 3 veins entering base; stigmas 3" 21
20 "Bract tips with 3 spreading, needle-like lobes; corolla lobes with 1 vein entering base; stigmas 2" 22
21 "Calyx hairs fine, obscure; calyx lobes entire" "Navarretia subuligera"
21 "Calyx coarsely appressed-hairy; calyx lobes toothed" "Navarretia tagetina"
22 "Plant generally mounding, dense, multiple heads in close proximity; corolla 4.5--6.5 mm; filaments 1--2.5 mm, anthers +- equaling corolla lobes" "Navarretia propinqua"
22 "Plant erect, open, multiple heads well separated; corolla 6--13.5 mm; filaments 1.5--4.7 mm, anthers exceeded by to exceeding corolla lobes" 23
23 "Corolla 6--8(13) mm, anthers exceeding corolla lobes" "Navarretia intertexta"
23 "Corolla 6.5--13.5 mm, anthers exceeded by to equaling corolla lobes" 24
24 "Corolla 9.5--13.5 mm, pale blue to white, lobes 1.25--2.5 mm wide; n&c SNF (Calaveras, Tuolumne cos.)" "Navarretia paradoxiclara"
24 "Corolla 6.5--9.5 mm, white, lobes 0.5--1.25 mm wide; NCoRI (Lake, Napa, Colusa cos.)" "Navarretia paradoxinota"
25 "Inflorescence a head (flowers sessile); plant prostrate; calyx tube long-soft-wavy-hairy" 26
25 "Inflorescence a dense cyme, flowers subsessile or short-pedicelled; plant generally not prostrate (except Navarretia leucocephala); calyx tube generally not long-soft-wavy-hairy (except Navarretia fossalis)" 28
26 "Corolla 7--9 mm, tube +- exserted; leaves at base of head lobed" "Navarretia prostrata"
26 "Corolla 12--21 mm, tube long-exserted; leaves at base of head entire or lobed in proximal 1/2" 27
27 "Corolla blue, tube 1--1.2 × calyx; outer bract lobes many" "Navarretia myersii subsp. deminuta"
27 "Corolla white, tube 2--4 × calyx; outer bracts lobes few" "Navarretia myersii subsp. myersii"
28 "Calyx lobes hairy; filament <= 1 mm; s California" "Navarretia fossalis"
28 "Calyx lobes glabrous or +- hairy; filaments 1--3 mm; n&c California" 29
29 "Stamens attached at corolla throat" 30
29 "Stamens attached at or just below corolla sinuses" 31
30 "Corolla 7--9 mm, tube exserted, throat 2--3 mm wide" "Navarretia leucocephala subsp. leucocephala"
30 "Corolla 4--6 mm, tube included, throat 1--2 mm wide" "Navarretia leucocephala subsp. minima"
31 "Inflorescence 2--20-flowered; outer bracts generally with 3--5 entire or forked lobes" "Navarretia leucocephala subsp. pauciflora"
31 "Inflorescence 10--60-flowered; outer bracts generally with >= 7 lobes, each 3--4-branched" 32
32 "Stem generally elongate, branches ascending; corolla white" "Navarretia leucocephala subsp. bakeri"
32 "Stem short, branches spreading; corolla blue" "Navarretia leucocephala subsp. plieantha"
33 "Leaf, bract axis +- linear (tapered in Navarretia filicaulis); terminal lobe >> to = lobed part of leaf" 34
33 "Leaf (at least upper), bract axis generally wide; terminal lobe < lobed part of leaf" 40
34 "Branches ascending, sparse, along stem; outer bracts pinnate-lobed, lowermost lobes departing above base, or base strongly concave" 35
34 "Branches generally spreading, dense, just below terminal head; outer bracts palmate-lobed at base, not concave" 37
35 "Leaf lobed near base; bract base concave; corolla bright purple" "Navarretia filicaulis"
35 "Leaf lobed near, above base; bract base flat; corolla lavender-white or yellow" 36
36 "Corolla yellow" "Navarretia breweri"
36 "Corolla lavender-white" "Navarretia peninsularis"
37 "Corolla 8--10 mm; stamens, style exserted" 38
37 "Corolla 4--7 mm; stamens, style included" 39
38 "Corolla lobes yellow" "Navarretia prolifera subsp. lutea"
38 "Corolla lobes blue to purple" "Navarretia prolifera subsp. prolifera"
39 "Corolla tube white, lobes pink-tipped; longest bract 5--10 mm" "Navarretia divaricata subsp. divaricata"
39 "Corolla purple; longest bract 7--20 mm" "Navarretia divaricata subsp. vividior"
40 "Outer bract tip lobes generally 3, +- separated from non-tip lobes" 41
40 "Outer bract tip lobes 0, non-tip lobes +- adjacent to each other" 44
41 "Leaf axis 2--6 mm wide, generally >= lobes; upper leaf, bract lobes ascending" "Navarretia atractyloides"
41 "Leaf axis generally 1--2 mm wide (wider in Navarretia hamata subsp. parviloba), < lobes; leaf, bract lobes spreading" 42
42 "Corolla pale blue or lavender; bracts long-hairy, not glandular, 3 lobes at tip +- equal" "Navarretia hamata subsp. parviloba"
42 "Corolla bright pink or purple; bracts gland-dotted or glandular-hairy, 3 lobes at tip generally unequal" 43
43 "Corolla tube included, throat wide, lobes +- 0.3 × corolla" "Navarretia hamata subsp. hamata"
43 "Corolla tube exserted, throat narrow, lobes +- 0.25 × corolla" "Navarretia hamata subsp. leptantha"
44 "Bract bases not concave, lobes in 2 planes; anthers included; stigma below anthers" 45
44 "Bract bases concave, lobes 2-ranked; anthers exserted or at mouth of throat, stigma at level of anthers" 46
45 "Corolla lobes 5--7 mm, = calyx, light blue" "Navarretia mellita"
45 "Corolla lobes 9--12 mm, > calyx, dark blue" "Navarretia squarrosa"
46 "Bract axis strap-shaped, much longer than wide" "Navarretia viscidula"
46 "Bract axis widely ovate, not much longer than wide" 47
47 "Corolla > calyx, purple; stamens, style exserted" "Navarretia heterodoxa"
47 "Corolla = calyx, lavender to white; stamens, style +- at mouth" "Navarretia rosulata"