230 PROCEEDINGS OP THE AMERICAN ACADEMY 



late, thin and lax in fruit : stamens and style exserted : capsule very 

 thin. — Proc. Philad. Acad. 1868, 171 ; Watson, 1. c. 486, t. 37, f. 7. 

 Sierra Nevada (Yuba to Mariposa Counties). 



22. A. attenuifolium, Kellogg. Reticulation delicate, horizon- 

 tally sinuate or serrate, the vertical lines also minutely sinuous : 

 leaves channelled: scape slender (6 to 15 inches high), leafy below: 

 spathe-valves short and abruptly acute: umbel usually dense: perianth- 

 segments 3 or 4 lines long, oblong-lanceolate, acuminate, lax and 

 thin in fruit, white or nearly so. — Proc. Calif. Acad. 2. 110, f. 34; 

 Watson, 1. c, t. 37, f. 8, 9. A. reticidatum, Benth. PI. Hartw. 339. 

 A. amplectens, Torrey, Pacif. R. Rep. 4. 148. A. occidentale, Gray, 

 Proc. Amer. Acad. 7. 390. Sierra Nevada and Coast Ranges, from 

 Mariposa County and San Francisco to Oregon. 



-w- ++ Scapes low : flowers rose-colored. 

 = Filaments more or less deltoid above the united discoid adnate base. 



23. A. serratum, Watson. Resembling A. acuminatum ; bulb-coats 

 readily fissile along the lines of the fine distinct horizontally serrate 

 reticulation : leaves very narrow : spathe-valves narrowly acuminate : 

 perianth-segments 4 to 6 lines long, deep rose-color, broadly ovate- 

 lanceolate, acute or somewhat acuminate, nearly straight and rather 

 rigid, the inner very rarely serrulate: filaments all with a narrowly 

 deltoid base above the very short disk : crests very narrow, central. — 

 King's Rep. 5. 487, t. 37, f. 4, 5 (reticulation). Coast Ranges (San 

 Diego to Marin County) and foot-hills of the Sierra Nevada. 



24. A. bisceptrum, Watson. Bulbs light-colored ; reticulation 

 indistinct, somewhat quadrilateral, the cells under a strong power 

 showing an exceedingly sinuous outline especially on the vertical 

 lines : leaves often 2 or 3 lines broad : scapes frequently in pairs : 

 flowers few to many, rose-color, 3 or 4 lines long ; segments oblong- 

 lanceolate, acuminate, slightly exceeding the stamens : the alternate 

 filaments with a broad deltoid adnate base : crests thin, conspicuous. — 

 King's Rep. t. 37, f. 1-3 (the figure of the flower faulty as respects 

 the base of the filaments). Sierra Nevada (Mono Lake and north- 

 ward) and mountains eastward to Utah. 



25. A. Palmeri, Watson. Habit of the last : bulb-coats with a 

 distinct somewhat quadilateral reticulation, the outline of the cells 

 very minutely sinuous : scape always solitary : perianth-segments 

 3 to 5 lines long, ovate-lanceolate, acuminate : filaments and crests 

 nearly as in the last. — King's Rep. 5. 487, t. 37, f. 10, 11. S. Utah 

 to E. Arizona and New Mexico. 



