1 "Bulblets present in inflorescence, present at bulb bases; disturbed places" 2 1 "Bulblets not present in inflorescence, present at bulb bases or on rhizomes or not; disturbed places or not" 3 2 "Bulb 1--2 cm diam; leaves 20--60 cm, 2--4 mm wide, hollow below middle" "Allium vineale" 2 "Bulb (1.5)3--8 cm diam; leaves 20--100 cm, 5--20 mm diam, solid" "Allium sativum" 3 "Leaves 1 per stem, cylindric; ovary crests 6, obvious, +- triangular" 4 3 "Leaves >= 2 per stem (if 1, leaf flat or channeled); ovary crests 6, obvious, +- triangular, or +- 0" 25 4 "Stigma lobes +- 0" 5 4 "Stigma lobes 3, often slender, recurved" 10 5 "Stamens exserted; perianth parts 5--9 mm, inner > outer, margins +- irregular to jagged; stem 20--50 cm" "Allium sanbornii var. sanbornii" 5 "Stamens included; perianth parts 8--20 mm, +- equal, entire; stem generally < 20 cm" 6 6 "Plants of DMtns, flowers white; outer bulb coat sculpture +- obvious, cells transversely elongate, intricately contorted; DMtns" "Allium nevadense" 6 "Plants not of DMtns or flowers not white; outer bulb coat sculpture 0 or cells +- square, in 2--3 rows basally, or obscurely polygonal" 7 7 "Perianth parts 8--12 mm; pedicels slender, > flowers" 8 7 "Perianth parts 12--20 mm; pedicels stout, generally < flowers" 9 8 "Perianth parts generally deep red-purple (white), lanceolate, appearing long-acuminate by inrolled margins" "Allium atrorubens var. atrorubens" 8 "Perianth parts pale pink, dark-veined, +- ovate, acute to acuminate" "Allium atrorubens var. cristatum" 9 "Perianth parts lance-linear, long-tapered; bulblets 1--2, stalked, at bulb base; TR, w PR" "Allium monticola" 9 "Perianth parts lanceolate, acute; bulblets 0; n SnBr, DMoj" "Allium parishii" 10 "Stamens exserted or +- at same level as perianth" 11 10 "Stamens included" 14 11 "Inner perianth parts 1.5 × outer; ovary crests entire or notched" "Allium sanbornii var. congdonii" 11 "Inner perianth parts +- = outer; ovary crests irregularly dentate to deeply cut" 12 12 "Stem (10)+- 20(35) cm, slender; flowers generally 10--30; perianth generally pink to lavender (white); ovary crests purple; flower Mar--Apr; s SNF, Teh, SnJV, SnFrB, SCoR, WTR" "Allium howellii var. howellii" 12 "Stem 20--60 cm, stout; flowers generally > 50; perianth generally white; ovary crests white or green; flower Apr--Jun; SCoRI, n WTR" 13 13 "Stamens exserted 0--2 mm; n WTR" "Allium howellii var. clokeyi" 13 "Stamens exserted 2--4 mm; SCoRI" "Allium howellii var. sanbenitense" 14 "Perianth parts (at least inner) dentate or jagged" 15 14 "Perianth parts +- entire" 17 15 "Stem 25--40 cm" "Allium jepsonii" 15 "Stem 5--20 cm" 16 16 "Outer bulb coats brown to gray; perianth +- spreading, tips reflexed, inner parts jagged" "Allium abramsii" 16 "Outer bulb coats red-brown; perianth erect, +- straight, inner parts dentate near tip" "Allium denticulatum" 17 "Ovary crests entire, notched, or jagged, not dentate to deeply cut" 18 17 "Ovary crests dentate to deeply cut" 21 18 "Perianth 10--18 mm, maroon or deep red-purple" 19 18 "Perianth 6--9 mm, white to pink, in age +- red" 20 19 "Perianth deep red-purple, tips +- spreading to +- erect; plants of serpentine, se SnFrB (Mount Hamilton Range)" "Allium sharsmithiae" 19 "Perianth maroon near tips, white or +- green basally, tips reflexed; plants not of serpentine, s SNH, Teh" "Allium shevockii" 20 "Inflorescence dense, pedicels straight in fruit; perianth parts elliptic to ovate, obtuse to acute" "Allium munzii" 20 "Inflorescence open, pedicels curved in fruit; perianth parts lanceolate, acuminate" "Allium parryi" 21 "Perianth dark red-purple, tips generally recurved to spreading" "Allium fimbriatum var. fimbriatum" 21 "Perianth white, pink, or lavender, midveins darker, tips erect" 22 22 "Flowers (6)8--12 mm" 23 22 "Flowers generally 6--9 mm" 24 23 "Stem slender, 10--25 cm; plants not of serpentine; SNE, DMoj" "Allium fimbriatum var. mohavense" 23 "Stem stout, 10--37 cm; plants of serpentine; c NCoRI" "Allium fimbriatum var. purdyi" 24 "Stem slender, 7--20 cm; perianth erect; SnFrB (Mount Hamilton Range), SCoR, WTR" "Allium diabolense" 24 "Stem stout, 25--50 cm; perianth spreading; c SNF (Tuolumne Co.)" "Allium tuolumnense" 25 "Stem 3--30 mm diam, hollow, inflated below middle; bulb generally 5--10 cm diam; flowers 100--500" "Allium cepa" 25 "Stem < 3 mm diam unless flattened and/or winged, solid or hollow, not inflated below middle; bulb < 3 cm diam; flowers 5--150" 26 26 "Bulbs oblong or oblong-ovoid, clustered on stout rhizome" 27 26 "Bulbs ovoid to +- spheric, not clustered on short rhizome" 29 27 "Stem 50--100 cm; perianth parts narrowly lanceolate, acuminate; stamens exserted" "Allium validum" 27 "Stem 10--40 cm; perianth parts narrowly ovate, acute; stamens including" 28 28 "Ovary topped with a low, papillate cap covering lobes" "Allium haematochiton" 28 "Ovary crests 6, obvious, triangular, margins papillate or not" "Allium marvinii" 29 "Ovary crests 6, obvious, triangular; bulblets > 3, generally << bulb, generally clustered at bulb base or on rhizome" 30 29 "Ovary crests 0 or obscure, not triangular; bulblets 1--3, +- = bulb, within bulb coats or on rhizome" 32 30 "Leaves generally withered in flower; perianth red-purple, rigid-keeled, +- shiny in fruit, tip margins inrolled, parts with a purple crescent adaxially just above base" "Allium campanulatum" 30 "Leaves generally not withered in flower; perianth white or pink to rose-purple, not keeled, papery in fruit, tip margins +- flat, parts without darker crescent adaxially" 31 31 "Perianth parts lanceolate, acuminate; CaRH, SNH, GB" "Allium bisceptrum" 31 "Perianth parts ovate to elliptic, acute; KR, CaRF, n&c SNF, s SNH" "Allium membranaceum" 32 "Leaves flat or widely channeled, +- sickle-shaped; plant in fruit dry, breaking at ground" 33 32 "Leaves narrowly channeled to +- cylindric, if flat or widely channeled, not sickle-shaped; plant in fruit dry or not, not breaking at ground" 48 33 "Outer bulb coat sculpture +- net-like throughout" 34 33 "Outer bulb coat sculpture 0 or cells +- square, in 2--3 rows basally" 39 34 "Outer bulb coat cells rectangular, transversely elongate, in +- regular rows" 35 34 "Outer bulb coat cells +- square or polygonal, if transversely elongate then curved and not in regular rows" 37 35 "Perianth parts lance-linear" "Allium anceps" 35 "Perianth parts ovate to oblanceolate" 36 36 "Stem 15--20 cm, inflorescence held well above ground; pedicel > flower" "Allium lemmonii" 36 "Stem 3--10 cm, inflorescence held near ground; pedicel +- = flower" "Allium punctum" 37 "Outer bulb coat cells curved, +- transversely elongate" "Allium tribracteatum" 37 "Outer bulb coat cells +- rectangular, +- transversely elongate, square, or polygonal" 38 38 "Leaves 1 per stem; perianth parts pink, lanceolate, acute" "Allium obtusum var. conspicuum" 38 "Leaves 1--2 per stem; perianth parts white, oblong-elliptic, obtuse" "Allium obtusum var. obtusum" 39 "Stem cylindric or +- flat, not winged" 40 39 "Stem +- flat, generally winged above" 44 40 "Stamens well including" 41 40 "Stamens exserted or +- at same level as perianth" 42 41 "Leaves straight or +- sickle-shaped; flowers 20--30; KR, NCoR, n&c SNF, s SNH, Teh, SCoRI, WTR, SnJt" "Allium cratericola" 41 "Leaves sickle-shaped; flowers generally 5--10; KR, CaRH, SNH, GB" "Allium parvum" 42 "Leaves 2 per stem" "Allium yosemitense" 42 "Leaves 1 per stem" 43 43 "Filaments smooth" "Allium burlewii" 43 "Filaments bumpy or warty near base" "Allium hoffmanii" 44 "Perianth parts lance-linear, long-acuminate; stamens exserted" "Allium platycaule" 44 "Perianth parts lanceolate to ovate, obtuse to long-acuminate; stamens including" 45 45 "Leaves generally 6--8 mm wide; perianth parts 9--15 mm, long-acuminate" "Allium falcifolium" 45 "Leaves < 6 mm wide; perianth parts 6--10 mm, obtuse to acute" 46 46 "Perianth parts lanceolate, acute, appearing acuminate by inrolled margins" "Allium tolmiei var. tolmiei" 46 "Perianth parts widely lanceolate to ovate, obtuse (tip margins +- flat)" 47 47 "Inner bulb coats white; perianth parts not keeled in fruit" "Allium parvum" 47 "Inner bulb coats generally pink to red; perianth parts keeled in fruit" "Allium siskiyouense" 48 "Outer bulb coat sculpture 0 or obscure" 49 48 "Outer bulb coat sculpture obvious, +- net-like" 54 49 "Bulb symmetric, present at flower; rhizomes 0" 50 49 "Bulb symmetric or not, +- 0 at flower; rhizomes obscure or obvious" 52 50 "Longest inflorescence bracts >> pedicels; flower 4.5--7 mm" "Allium paniculatum var. paniculatum" 50 "Longest inflorescence bracts <= pedicels; flower 7--18 mm" 51 51 "Inflorescence not +- 1-sided; flowers erect; perianth parts elliptic, obtuse" "Allium neapolitanum" 51 "Inflorescence generally +- 1-sided; flowers pendent; perianth parts lanceolate, acute" "Allium triquetrum" 52 "Rhizomes obvious, generally 3--5 cm; leaves widely channeled or +- flat, keeled; perianth parts ovate to obovate, ascending, entire" "Allium unifolium" 52 "Rhizomes obscure, < 2 cm; leaves +- cylindric; perianth parts +- lanceolate, erect, at least inner serrate" 53 53 "Bulb oblique-ovoid, not tuber-like, outer coat breaking with serrate edges; perianth parts 8--12 mm, narrowly ovate" "Allium bolanderi var. bolanderi" 53 "Bulb oblique-oblong, tuber-like, outer coat breaking with irregular edges; perianth parts 9--14 mm, narrowly lanceolate" "Allium bolanderi var. mirabile" 54 "Outer bulb coat cells square, polygonal, in regular rows, not in +- herringbone pattern, not +- contorted" 55 54 "Outer bulb coat cells transversely elongate, in +- herringbone pattern, or +- contorted" 59 55 "Perianth parts 8--15 mm, spreading (or tips reflexed), inner dentate" "Allium acuminatum" 55 "Perianth parts 4--9 mm, erect or spreading, entire" 56 56 "Stem 10--25 cm; inflorescence dense, pedicel 0.7--1.5 × flower" 57 56 "Stem 15--35 cm; inflorescence open, pedicel 1.5--3.5 × flower" 58 57 "Leaves generally < stem; stem 15--25 cm; flowers 5--7 mm; s SNF, Teh, w DMoj" "Allium lacunosum var. kernense" 57 "Leaves > stem; stem 10--20 cm; flowers 6--9 mm; n CCo, s SnJV, SCoR, SCo, n ChI" "Allium lacunosum var. lacunosum" 58 "Bracts 2; flower 6--8 mm; WTR, SnBr, SNE, DMoj" "Allium lacunosum var. davisiae" 58 "Bracts 3; flower 4--6 mm; SCoR, SnBr, PR" "Allium lacunosum var. micranthum" 59 "Outer bulb coat cells in obscure, wavy, herringbone pattern; perianth parts spreading, outer +- = inner" 60 59 "Outer bulb coat cells in obvious, not wavy, herringbone pattern; perianth parts +- erect, outer > inner" 63 60 "Stem 5--17 cm; perianth parts erect in fruit; flowers persistent --- c CCo" "Allium hickmanii" 60 "Stem 15--50 cm; perianth parts folded over fruit; flowers, pedicels deciduous" 61 61 "Ovary crests 6, lateral, +- rectangular; inflorescence dense, pedicels 0.7--2 × flower" "Allium amplectens" 61 "Ovary crests 0 or 3, central, minute; inflorescence open, pedicels 1.5--4 × flower" 62 62 "Leaves 1--3(4) mm wide, widely channeled to cylindric, not keeled; inner bulb coats light yellow; perianth translucent in fruit" "Allium hyalinum" 62 "Leaves (3)4--6 mm wide, widely channeled or flat, keeled; inner bulb coats white; perianth +- opaque, papery in fruit" "Allium praecox" 63 "Perianth parts folded over ovary in fruit; flowers, pedicels deciduous" "Allium serra" 63 "Perianth parts erect, rigid in fruit; flowers, pedicels persistent" 64 64 "Leaves 3--6 per stem, curved to curled; inflorescence dense, pedicels erect, 0.7--2 × flower; on or near sea cliffs" "Allium dichlamydeum" 64 "Leaves 2--3 per stem, straight to +- curved; inflorescence open, pedicels spreading, 1--3 × flower; not on or near sea cliffs" 65 65 "Inner perianth part margins dentate, curled" "Allium crispum" 65 "Inner perianth part margins entire to dentate, not curled" 66 66 "Leaves curved; flowers 8--12 mm; stigma minute, entire; CCo, SnFrB" "Allium peninsulare var. franciscanum" 66 "Leaves straight; flowers 10--15 mm; stigma 3-lobed or head-like; widespread" "Allium peninsulare var. peninsulare"