114 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



6. Eleocharis acicularis (L.) Roem. & Schult. Syst. Veg. 2: 154. 1817. 



Scirpus acicularis L. Sp. PI. 48. 1753. 



Type locality: European. 



Range: Throughout North America except in the extreme northern part; also in 

 the Old World. 



New Mexico: Tunitcha Mountains; West Fork of the Gila; Cloverdale. Wet soil. 



Eleocharis capitata R. Br. and E. atropurpurea (Retz.) Kunth may come into New- 

 Mexico, as they occur very close to our borders. 



4. STENOPHYLLUS Raf. 



Small grasslike annuals, 15 cm. high or mostly less, with basal leaves and umbel- 

 late or capitate flower clusters of small spikelets subtended by 1 to several bracts; 

 flowers perfect; glumes overlapping; perianth none; stamens 2 or 3; style swollen at 

 the base and persistent; achenes 3-angled or lenticular. 



KEY TO THE SPECIES. 



Achenes longitudinally ribbed and transversely roughened; plants 10 

 to 15 cm. high; spikelets solitary or umbellate on the same 

 plant 1. S. capillaris. 



Achenes rugose; plants 8 cm. high or less; spikelets solitary at the 



summit of the culm and also at the bases of the leaves 2. S.funckii. 



1. Stenophyllus capillaris (L.) Britton, Bull. Torrey Club 21: 30. 1894. 

 Scirpus capillaris L. Sp. PI. 49. 1753. 



Fimbristylis capillaris A. Gray, Man. 530. 1848. 



Type locality: "Habitat in Virginia, Aethiopia, Zeylona." 



Range: Throughout North America except in the extreme northern part; also in 

 the Old World. 



New Mexico: Mogollon Mountains; Santa Rita; San Luis Mountains; Organ Moun- 

 tains. Wet ground, in the Upper Sonoran Zone. 



2. Stenophyllus funckii (Steud.) Britton, Bull. Torrey Club 21: 30. 1894. 

 Isolepis funckii Steud. Syn. PI. Glum. 2: 91. 1855. 



Scirpus heterocarpus S. Wats. Proc. Amer. Acad. 18: 171. 1883. 



Type locality: Venezuela. 



Range: Arizona and New Mexico, southward through tropical America to Bolivia. 



New Mexico: West Fork of the Gila (Metcalfe 661). Wet ground. 



5. SCIRPUS L. Bulrush. 



Annuals or perennials, sometimes small and grasslike, sometimes tall (1 meter or 

 more), with reduced basal leaves or sheaths; spikelets cylindric or somewhat flat- 

 tened, spirally imbricated, in terminal clusters, single, capitate, or umbellate, sub- 

 tended by 1 to several bracts; flowers perfect; perianth of 1 to 6 bristles (rarely none); 

 stamens 2 or 3; style not swollen at the base; achenes triangular or lenticular. 



KEY TO THE SPECIES. 



Involucral bracts 1 or 2 or none. 



Spikelets solitary, terminal; involucral bracts none 1. S. pauciflorus. 



Spikelets several, seemingly lateral; involucral bracts 1 or 2. 



Culms terete; involucral bracts 2 5. S. occidentalis. 



Culms triangular; involucral bract 1, seeming to be a pro- 

 longation of the culm. 

 Involucral bract short, 3 cm. long or less, barely ex- 

 ceeding the spikelets, these generally 4 to 6, 

 crowded; leaves about one-fifth the length of 

 the culm 2. S.olneyi. 



