230 PROCEEDINGS OF 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. reticulatum, Benth. Pl. 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. 
++ ++ 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. 
