CYPERACEAE (SEDGE FAMILY) 



195 



803. S. Peckii. 



304. S cyperinus. 



2-7 ; scales oblong-ovate, acutish or obtuse, blackish- 

 ferruginous above the pale base ; achene soft, whitish, 

 oblong. Meadows and bogs, N. H., Vt., and n. N. Y 

 July, Aug. FIG. 303. 



32. S. cyperinus (L.) Kunth. (WOOL GRASS.) Culm 

 nearly terete (1-1.5 in. high) ; leaves narrowly linear, 



long, rigid, those of the involucre 



3-5, longer than the loose umbel 



(1.5-3 dm. long), the tips of the 



rays at length drooping ; involucels 



reddish-brown ; spikelets exceedingly 



numerous, ovoid, clustered, woolly 



at maturity (3-6 mm. long) ; the rust-colored bristles much 



longer than the pointless reddish-brown scales; achene 



short-pointed. (Eriophorum L.) Wet meadows and 



swamps, N. E. to Va., Tenn., and Ark. Aug., Sept. FIG. 



304. Var. ANDREWSII Fernald. Involucels reddish-brown ; 



spikelets cylindric, 7-10 mm. long. Local, Ct. 



Var. pdlius Fernald. Involucels blackish at base; 

 bristles drab or smoke-color. The common form northw. ; 

 Nfd. to Ont., s. to Ct., N. Y., and Mich. Perhaps dis- 

 tinct. Var. CONDENSXTUS Fernald. Similar, but with 

 rays all or nearly all abbreviated, the glomerules in dense 

 irregular masses. Local, range of last. Aug. -Oct. 



33. S. Eri6phorum Michx. Coarse and tall (1-2 m.) ; the culm 2.5-6 mm. 

 thick below the ample (1.5-3 dm. high) inflorescence; leaves pale green, firm, 

 6-11 mm. broad; rays very elongate, mostly ascending, drooping at tip; the 

 involucels deep red-brown or terra-cotta ; spikelets ovoid, 3-6 mm. long, the 

 lateral pediceled ; scales red-brown; wool slightly paler. Mostly near the coast, 

 Ct. to Fla., La. , and Ark. July-Sept. 



34. S. pedicellatus Fernald. Similar; the culm rather stout (2-4 mm. 

 thick below the inflorescence) ; leaves pale green, firm, 3-10 



mm. broad ; inflorescence ample, 1-2.5 dm. high, the numerous 



ascending subequal rays very slender, with nodding tips ; 



involucels brown to dull straw-color ; spikelets 3-6 mm. long ; 



scales pale brown; wool whitish-brown. Alluvial thickets 



and swamps, e. Que. to Ct., N. Y., and Wis., mostly in the 



interior. July, Aug. FIG. 305. Ordinarily very distinct, 



occasionally approaching the preceding or the following as in 



Var. PULL us Fernald. Spikelets dull brown or drab, 7-10 mm. 



long. Local, and perhaps as nearly related to the next (including 8. atrocinc- 



tus, var. grandis Fernald). 



35. S. atrocinctus Fernald. Slender (0.5-1.2 m. high); the culm 1-2 mm. 

 in diameter below the inflorescence ; leaves bright green, rather soft, 2-5 mm. 

 broad; inflorescence 0.5-1.8 dm. high, the slender rays very unequal ; involucels 

 and base of involucre black; spikelets 2.5-6 mm. long, mostly pediceled; scales 

 greenish-black; wool drab or olive-brown. Meadows and swamps, abundant 

 northw. ; Nfd. to Hudson Bay and Sask., s. to Ct., Pa., Mich., and la. June, 

 July (Aug. in colder regions). Var. BRACK YPODUS Fernald. Spikelets on 

 shortened pedicels, in irregular dense clusters; rays usually much reduced. 

 Frequently occupying large areas, especially northw. and at higher altitudes 

 than the typical form. 



305. S. pedicellatus. 



10. ERI6PHORUM L. COTTON GRASS 



Kristles naked, very numerous, silky and becoming greatly elongated. Other- 

 as in Scirpus. Spikelets single or clustered or umbellate, when involu- 

 crate with leaf-like bracts, upon a leafy or naked stem ; scales membranaceous, 

 1-5-nerved, some of the lowest usually empty. Style very slender and elongated, 





