GRASS FAMILY 93 



Open ground, chiefly in the Eastern States from Maine to Texas. Rare in 

 California: Sacramento, Michencr 142: Three Rivers, Coville & Funston 1286. 



Refs.— Panicum lindheimeri Nash, Bull. Torr. Club 24: 196. 1897. P. funstoni Scribn. 

 & Merr. U. S. Dept. Agr. Div. Agrost. Circ. 35: 4. 1901, type Coville # Funston 1286. 



9. P. huachucae Ashe. Vernal form usually stiffly upright, more or less 

 harsh-pubescent throughout; culms 1 to 2 feet high, the nodes bearded; ligule 

 of stiff hairs about 2 lines long; panicle 2 to 3 inches long, the axis and usually 

 the branches pilose; spikelets about % line long, obovate, turgid, pubescent; 

 autumnal form stiffly erect, the reduced branches fascicled, the crowded blades 

 ascending. 



Open ground, chiefly in the Mississippi Valley, rare in (California. San Ber- 

 nardino IMts., Ahrams 2737. 



Ref. — Panicuh huachucae Ashe, Jour. Elisha Mitchell Soc. 15: 51. 1898. 



10. p. occidentale Scribn. Vernal form yellowish green; culms slender, 6 

 to 12 inches high, spreading, sparsely pubescent; leaves tending to be clus- 

 tered toward the base; sheaths sparsely pubescent; ligule ciliate, about 2 

 lines long; blades glabrous or nearly so above, appressed-pubescent beneath; 

 panicle 2 to 3 inches long, open; spikelets % line long, pubescent; autumnal 

 form branching from the lower nodes, forming a spreading tussock; leaves 

 and panicles reduced. 



Peat bogs and moist sandy soil. San Diego Co. to British Columbia. 



Loes. — Crescent City, Davy 5971; Mendocino, Davy 6092; New York Falls, Hansen 1723; 

 Yosemite Valley, Brewer 1646; Merced River, Torrey 587; San Diego, Orcutt 540. 



Refs. — Panicum occidentale Scribn. Rep. Mo. Bot. Gard. 10: 48. 1899. P. puhescens 

 [Lam. misapplied by] Presl, Rel. Haenk. 1: 306. 1830. 



11. P. pacificum Hitchc. & Chase. Vernal form light green, more or less 

 papillose-pilose throughout, 1 to 2 feet high; ligule ciliate, about 2 lines long, 

 spikelets % to 1 line long, obtuse, pubescent; autumnal form pi'ostrate-spread- 

 ing, repeatedly branching from the upper and middle nodes. 



Sandy shores and slopes, and moist crevices in rocks. San Bernardino Mts. 

 to British Columbia. The commonest species of the genus in California. Dis- 

 tinguished from P. occidentale by the more copious pubescence throughout, 

 more leafy culms, and, in the autumnal form, by the branching habit. 



Loes. — Requa, Davy ij'- Blasdale 5S94 ; Red<ling, Heller 7856; Yosemite Valley, Bolander 

 4840, Hall # Bahrock 3317, 3362; Pinegrove, Amador Co., Hansen 626; Pt. Reyes, Davy 

 6745, 6780; San Bernardino Mts., Parish Bros. 1663. 



Refs.— Panicum pacificum Hitchc. & Chase, Contr. Nat. Herb. 15: 229. f. 241. 1910, type 

 from Castle Crag, Hitcheoclc 3070. P. dichotomiim [L. misapplied by] Thurb. in Wats. Bot. 

 Oal. 2: 259. 1880; Davy in Jepson, Fl. W. Mid. Cal. 32. 1901. P. scoparium [Lam. mis- 

 applied by] Abrams, Fl. Los Ang. 24. 1904. Thurber (1. c.) and Davy (1. e.) also included 

 P. thirmiilc anil pmliably other allied species under P. dicholoinum. 



12. P. thermale Boland. Vernal form grayish green, densely tufted, vel- 

 vety-villous, 4 to 12 inches high ; culms ascending or spreading; nodes bearded; 

 ligule about II/2 lines long; blades densely velvety-villous on both surfaces; 

 spikelets about 1 line long, pubescent; autumnal form widely spreading, 

 repeatedly branching, forming a dense cushion. 



Wet saline soil in vicinity of hot springs, Lassen Peak, Bolander 2169; 

 Sonoma Co., Brewer 861 ; common around geysers of Yellowstone Park ; also 

 occurring in Alberta and Idaho. Distinguished chiefly by the velvety 

 pubescence and spreading habit. 



Refs. — Panicum thermale Boland. Proc. Cal. Acad. 2: 181. 1862, type from Sonoma 

 Co., Bolander 3941. Included under P. dichotommn by Thurber and by Davy (see above 

 under /'. pacificum). 



