130 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



4. TOXICOSCORDION Rydb. Death cam ass. 



Plants much as in the preceding genus, but the flowers smaller and much more 

 numerous, the perianth segments with obovate or semiorbicular glands, and the 

 ovary wholly superior instead of partly inferior. 



KEY TO THE SPECIES. 



Plants stout; leaves 10 to 15 mm. wide; inflorescence paniculate, 



widely branching 1. T. panieulatum . 



Plants slender; leaves about 5 mm. wide (strongly falcate); in- 

 florescence racemose, little or not at all branched 2. T.fahatum. 



1. Toxicoscordion panieulatum (S. Wats.) Rydb. Bull. Torrey Club 30: 272. 



1903. 

 Zygadenus paniculatus S. Wats, in King, Geol. Expl. 40th Par. 5: 343. 1871. 

 Type locality: "Oregon and Washington Territory." 



Range: Montana and Washington to California and northwestern New Mexico. 

 New Mexico: Carrizo Mountains (Matthews). Open hills, in the Upper Sonoran 

 Zone. 



2. Toxicoscordion falcatum Rydb. Bull. Torrey Club 30: 272. 1903. 

 Zygadenus falcatus Rydb. Bull. Torrey Club 27: 536. 1900. 



Type locality: Fort Collins, Colorado. 



Range: Colorado and northwestern New Mexico. 



New Mexico: Aztec (Baker 260). Open hills, in the Upper Sonoran Zone. 



20. JUNCACEAE. Rush Family. 



Grasslike plants, annuals or perennials, tufted or from rootstocks, with terete solid 

 stems; leaves various, the sheaths open or closed, the margins sometimes produced 

 into auriculate ligule-like organs, the blades flat or terete or wanting; inflorescence 

 of terminal heads, spikes, or panicles, usually bracted; flowers regular, mostly com- 

 plete, 3-merous; sepals and petals 3 each, more or less glumelike; stamens 3 or 6; 

 ovary superior, 1 or 3-celled, forming a 1-celled or 3-celled capsule with 3 to many seeds. 



KEY TO THE GENERA. 



Leaf sheaths open; capsules 1 or 3-celled; seeds many 1. Juncus (p. 130). 



Leaf sheaths closed; capsules 1-celled; seeds 3 2. Juncoides (p. 134). 



1. JUNCUS L. Rush. 



Chiefly perennial herbs of wet soil, with pithy or hollow, usually simple stems; 

 leaf sheaths open; flowers cymose or glomerate, small, greenish or brownish; capsule 

 3-celled or rarely 1-celled, the seeds numerous, often appendaged. 



KEY TO THE SPECIES. 



Lower bract of the inflorescence terete, erect, appearing as an 

 elongation of the stem; inflorescence apparently lateral. 

 Flowers few, 1 to 5, one of them subsessile, the others pedi- 



celed 1. J. drummondii. 



Flowers several, in a more or less compound panicle. 



Plants slender; bracts extending considerably beyond 



the inflorescence; basal sheaths without blades. . . 2. «/. balticus. 

 Plants stout; bracts short, extending little if at all beyond 

 the inflorescence; uppermost basal sheath bearing 

 a scapiform blade 3. /. mexicanus. 



