LJLY FAMILY 381 



Leaves flat or channelled, 2 or more, very rarely reduced to 1. 



Ovary obscurely or not at all crested; scapes terete, or somewhat 2-edged. 



Leaves shorter than or little exceeding the scapes. < i j , ■■ 



Perianth-segments lanceolate, acuminate. 6. A. aouglasix. 



Perianth-segments ovate-oblong. 7. A madidiim. 



Leaves much exceeding the very short scapes. _ _ 



Bracts 3, or sometimes 2; bulb-coats with fine hexagonal reticulations. 



8. A. tnbracteatum. 

 Bracts 2; bulb-coats without reticulations. 



Perianth-segments obtuse. 9. A. parzum. 



Perianth-segments acuminate. 10. A. macrum. 



Ovary distinctly crested; scapes compressed and 2-edged or 2-winged (nearly terete in A. 

 cnsickii) ; ' leaves broad and falcate. 



Ovary with 3 crests, the edges of the crests forming 2 ridges on the back of each 

 ovary-cell. 

 Bracts ovate-lanceolate, acuminate. 



Perianth-segments narrowly attenuate from the base, spreading above. 



11. A. fatcifolium. 



Perianth-segments ovate-lanceolate, acute, the tips not spreading. 



12. A. brewert. 

 Bracts round-ovate, obtuse, mucronate. 13. A. watsoni. 



Ovary 6-crested. , , . 



Stamens about equalling the narrow perianth-segments. 14. A. aiiceps. 



Stamens well-included. 



Ovary with prominent crests; stamens halt the length of the segments. 



15. A. pleianthiim. 

 Ovary with low dorsal crests; stamens three-fourths the length of the segments. 

 Scapes scarcely compressed. 16. C- cusickit. 



Scapes distinctly compressed. ■.n a i ■ • 



Scapes with the winged margins entire. 17. A. tolmiei. 



Scapes with the winged margins crenulate. 18. A- crcnulatum. 



Bracts 3-5; perianth-segments attenuate. 19- A. plafycaule. 



Leaves solitary; ovary 6-crested. 

 Stigma entire or obscurely lobed. 



Crests of the ovary low and entire; perianth-segments obtuse; leaves Hat _ 



Bracts obtuse; anthers purple. 20. A. burlewn. 



Bracts acuminate; anthers yellow. 21. A. obtusum. 



Crests of the ovary prominent, more or less toothed or lacerate; leaves terete. 

 Perianth-segments 10-12 mm. long, little exceeding the stamens. ^^ ^ ^ , 



22. A. atronibeiis. 



Perianth-segments 13-17 mm. long, twice the length of the stamens. _ 



2o. A. parishn. 



Stigma 3-lobed, the lobes linear. 



Stamens included; bracts 2, rarely 3 in A. parry,. f;,„h.;^t,.,„ 



Stamens half the length of the segments. 24. A. fimbnatiim. 



Stamens nearlv equalling the segments. 2s. A. pai lyi. 



Stamens exserted;' bracts usually 4. 26. A. sanbornu. 



Outer bulb-coats with evident reticulations. 



Reticulations of coats oblong or quadrate, not contorted. 



Walls of the reticulations similar. . 



Reticulations prominent, the meshes forming distinct pits; ovary 3-crested. 



Inner perianth-segments serrate. 27. A acuminatum. 



Inner perianth-segments entire. 28. A._ lacunosum. 



Reticulations fine, the compressed transversely oblong meshes not forming pits; ovary 

 with 6 crests. , ^ . 29. A. ncvn. 



Walls of the reticulations dissimilar, the vertical thickened and sinuous. 

 Ovary prominently 6-crested. 



Perianth-segments broadly ovate-lanceolate, acute, thin and spreading. ^^ ^^ ^^^^ 



Perianth-segments lanceolate or narrowly ovate-lanceolate, acuminate, not thin and 

 spreading. t i j 



Crests of the ovary widely spreading. 31. A. austinae. 



Crests of the ovary thin, erect. 32. A bisceptrnm. 



Ovary with low broad obscure crests. 33. A. lemmom. 



Reticulations of bulb-coats much contorted. 



Reticulations not in serrated rows, the walls irregularly contorted or vvavy 



Ovary obscurely ridged near the summit. 34. A. {jO''"'"'"; 



Ovary prominently 6-crested. . . 33. A. nevadense. 



Reticulations of transverse linear V-shaped meshes, appearing in serrated rows. 

 Bracts scarcely 1 cm. long, rounded at the apex, mucronate. ,£ . , • t 



Ovary without crests; perianth-segments not becoming lax. 36. A. lucRmam. 



Ovary distinctly 6-crested; perianth-segments becoming lax. 3/. A. ampiecteiis. 



Bracts 15-25 mm. long, acuminate. . 



Ovary with 6 central crests at the base of the style; perianth-segments erect or 

 spreading only near the tip. ■■ , , j 



Perianth-segments broadly oblong-ovate, obtuse. . 38. A. dichlamydcum. 



Perianth-segments ovate-lanceolate, acute or acuminate. 



Umbels congested and subcapitate; perianth-segments 8 mm. long. ^^ ^^^^^^ 



Umbels open, the pedicels widely spreading. ., , , , j „,„ 



Outer and inner perianth-segments dissimilar, the outer broader and more 

 s n r c 3, Q 1 n ET. 

 Inner perianth-segments crisped. 40. A. cnspum. 



Inner perianth-selments not crisped. , 41.. A. pemnsulare. 



Outer and inner perianth-segments similar m shape, the inner conspicuously 

 serrate "*-• ^- oolanderi. 



Ovary not crested;' perianth open-campanulate; style much longer than the capsule. 

 Scapes arising directly from the bulbs. hvalinum 



Perianth becoming hyaline 43. A. I^yahuum. 



Perianth not becoming hyaline. 44. ^ unifnHum 



Scapes arising from lateral oflt-shoots of the coated corm. 4o. A. uutfolinm. 



