CYPERACBAE (SEDGE FAMILY) 



195 



. S. Peokii. 



2-7 ; scales oblong-ovate, aoutish 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 m. high) ; leaves narrovyly 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. ANDREwsiiFernald. Involucels reddish-brown ; 



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



Var. p§lius Fernald. Involucels blackish at base; 

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

 Md. 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. Erifiphonim 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; tht 

 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. pediceimtus 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-broion. — 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. pi}llus Fernald. Spikelets dull brown or drab, 7-10 mm. 

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

 tus, vax. grandis Fernald). 



35. S. atrocfnctus 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. ERACHfpoDus '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. 



30.;>. S. pedicellatus. 



10. ERi6pH0RUM L. Cotton Grass 



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

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

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

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



