284 



PROCEEDINGS OP THE AMERICAN ACADEMY 



segments narrowly linear, 2 to 2| lines long, scarcely exceeding the 

 stamens: filaments covered nearly to the top with dense tangled 

 wool : capsule 5 lines long : seeds f line (or with the tails 3 to 4 

 lines) long. — Bot. Mag. t. 1505; Baker, Journ. Linn. Soc. 15. 351. 

 JV. ossifragum, var. Americanum, Gray, Manual, 536. New Jersey. 



2. N. Californicum, Baker, 1. c. Leaves usually 7-nerved, 1 1 lines 

 broad : raceme open, 3 to 5 inches long : perianth-segments linear- 

 lanceolate, 3 or 4 lines long, a third longer than the stamens : hairs 

 upon the filaments ascending: seeds more numerous (10 to 15 in each 

 cell), a line long (5 lines including the tails). — A 7 ", ossifragum, var. 

 occidental, Gray, Proc. Amer. Acad. 7. 391. Northern California 

 (Mendocino and Sierra Counties). 



50. XEROPHYLLUM, Michx. 



1. X. SETiFOLior, Michx. Stem 1 to 4 feet high: leaves a line 

 broad or less : raceme becoming 6 inches long or more : perianth- 

 segments oblong-ovate, 3 lines long, exceeding the stamens : styles 

 longer than the ovary : capsule elliptic-oblong, obtuse, 2 lines long : 

 seeds 2 in each cell, not at all appendaged. — Helonias asphodeloides, 

 Linn. ; Curt. Bot. Mag. t. 748 ; Lodd. Bot. Cab. t. 394. X aspho- 

 deloides, Nutt. ; Gray, Manual, Cr2G. New Jersey to Georgia. 



2. X. tenax, Nutt. Stem 2 to 5 feet high : leaves about 2 lines 

 broad, often 2 or 3 feet long: raceme becoming a foot or two dong, 

 with usually longer pedicels (mostly 1 to 2 inches) : perianth- 

 segments oblong, 4 or 5 lines long, scarcely equalling the stamens : 

 styles exceeding the ovary, 2 lines long: capsule broadly ovate, acute, 

 loculicidally 3-valved, nearly 3 lines long : seeds 2 to 4 in each cell, 

 narrowly oblong, 2 lines long, thinner and narrower at the upper end. 



— Helonias tenax, Pursh, Fl. 1. 243, t. 9. X. setifolium, Lindl. Bot. 

 Reg. t. 1613. California (Monterey and Plumas Counties) to British 

 Columbia (Lyall). 



3. X. Douglasii. Pedicels shorter (\ to l\ inches long) : flowers 

 smaller, the segments (2£ lines long) exceeding the stamens : styles a 

 line long : capsule cordate-ovate, 2 lines long, 6-valved, the abruptly 

 acute cells separating and then dehiscing : seeds shorter and broader. 



— X. setifolium, var., Gray, Proc. Amer. Acad. 8. 405. Collected 

 by Douglas, probably in Oregon, and distributed with his specimens 

 of the last species. Also found by Hall (n. 533) near the Columbia 

 River, and by Hay den in the mountains of Montana on the head- 

 waters of the Yellowstone. 



