258 CYPERACEAE. 



2. Psilocarya scirpoides Torr. Long-beaked Bald-rush. (Fig. 602.) 



Psilocarya scirpoides Torr. Ann. Lye. X. Y. 3: 360. 

 1836. 



Rhynchospora scirpoides A. Gray, Man. Ed. ^ 568. 

 1867. _,.., .._._ 



171 Similar to the preceding species and perhaps 

 not specifically distinct. Umbels commonly 

 more numerous; spikelets oblong or ovoid-ob- 

 long; achene nearly orbicular in outline, bicon- 

 vex, not as flat as that of P. nilens, dark brown, 

 faintly transversely wrinkled or smooth, some- 

 times longitudinally striate, slightly contracted 

 at the base into a short stipe; tubercle subulate, 

 as long as or sometimes longer than the achene, 

 its base decurrent on the edges. 



In wet soil, eastern Massachusetts and Rhode 

 Island. July-Sept. 



7. STENOPHYLLUS Raf. Xeog. 4. 1825. 



Mostly annual sedges, with slender erect culms, leafy below, the leaves narrowly linear 

 or filiform, with ciliate or pubescent sheaths. Spikelets umbellate, capitate or solitary, sub- 

 tended by a i-several-leaved involucre, their scales spirally imbricated all around, mostly 

 deciduous. Flowers perfect. Perianth none. Stamens 2 or 3. Style 2-3-cleft, glabrous, 

 its base much swollen and persistent as a tubercle on the achene as in Eleocharis. Achene 

 3-angled, turgid or lenticular. [Greek, referring to the narrow leaves.] 



A genus of some 20 species, natives of temperate and warm regions. Besides the following, 

 5 others occur in the southern United States. 



i. Stenophyllus capillaris (L.) Britton. Hair-like Stenophyllus. 



(Fig. 603.) 



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

 Fimbristylis capillaris A. Gray, Man. 530. 

 1848. 



Stenophyllus capillaris Britton, Bull. Torr. Club, 



21. 30. 1894. 



Annual, roots fibrous, culms filiform, 

 densely tufted, erect, grooved, smooth, 2 / -io / 

 tall. Leaves filiform, roughish, much shorter 

 than the culm, their sheaths more or less 

 pubescent with long hairs; involucral leaves 

 1-3, setaceous, shorter than, or one of them 

 exceeding the inflorescence; spikelets nar- 

 rowly oblong, somewhat 4-sided, 2^ // -4 // 

 long, less than i" thick, several in a termi- 

 nal simple or sometimes compound umbel, 

 or in depauperate forms solitary; scales ob- 

 long, obtuse or emarginate, puberulent, dark 

 brown with a green keel; stamens 2; style 3- 

 cleft; achene yellow-brown, narrowed at the 

 base, very obtuse or truncate at the summit, 

 X" long, 3-angled, transversely wrinkled; 

 tubercle minute, depressed. 



In dry or moist soil, throughout North Amer- 

 ica except the extreme north. Also in tropical 

 America. July-Sept. 



