CYPERACEAE (sedge FAMILY) 



203 



!38. S. paucif., 

 V. kansaua. 



834. S. cUiata. 



886. S. EUiottii. 



Var. kansflna Fernald. Very slender and pubescent ; each 

 pair of tubercles hearing a smaller intermediate one. — Sandy soil, 

 Cherokee Co., Kan. Fig. 333. 



4. S. cilUta Michx. Usually coarser, 

 0.5-1 m. high, glabrous, or slightly pubescent 

 below ; leaves firm, 1-2.5 mm. wide, becoming 

 revolute ; fascicles 1 or 2, usually solitary, 0.7-2.5 cm. long ; 

 bracts ciliate ; scales smooth ; achene 2-3 mm. in diameter, 

 the disk bearing 3 broad shallow entire or barely notched 

 tubercles. — Pine-barrens, etc., Va. and 

 Mo. to Fla. and Tex. July, Aug. 

 (W. I.) Pig. 334. 



5. S. Elli6ttii Chapm. Coarser and 

 lower, 3-6 dm. high ; the culms and flat 

 leaves (2.6-6 mm. wide) pubescent; 

 fascicles 2 or 3, usually subapproximate, 



forming an interrupted head 1.6-3.5 cm. long; bracts 



coarsely ciliate; scales ciliate on the back; achene with 



2 low broad tubercles, each 2-lobed. — Pine-barrens and 

 dry ground, Va. and Mo,, southw. May- 

 July. (W. I.) Fig. 335. 



* * * Achene reticulated or wrinkled. 



6. S. reticularis Michx. Culms slender, 

 erect, smooth (1.5-7 dm. high); leaves linear (1.5—4 mm. wide), 

 smooth ; lateral fascicles 1-3, loose, remote, nearly erect, on 

 short often included peduncles ; bracts glabrous ; 

 achene globose, regularly reticulated and pitted, 

 the pits often vertically arranged, not hairy, resting 

 upon a double greenish conspicuously 3-lobed 

 disk, the inner appressed to and deciduous with the 

 achene. — Damp sand and pine-barrens, local, e. 

 Mass. to Fla. ; n. Ind. Aug., Sept. Fig. 336. 

 3S6 S reticularis ^^^' puli^scens Britton. Culms weak, diffuse, U.3-1 m. 

 ■ high, slightly scabrous or smooth ; leaves linear (2-7 mm. wide), 

 smooth ; lateral fascicles loose, on more or less elongated and drooping filiform 

 ; achene irregularly pitted-reticulated or pitted-rugose with the ridges 

 often somewhat sjnrally arranged and more or less hairy. {S. Tor- 

 reyana Walp. ; S. trichopoda C.Wright.) — Pine-barrens, etc., Ct. 

 and Ind. to Fla. and Tex. (W. I.) Fig. 337. 



7. S. verticillata Muhl. Smooth ; culms simple, slender (1-9 

 dm. high) ; leaves narrowly linear ; fascicles 4-6, few-flowered, ses- 

 sile in an interrupted spike ; achene globose, somewhat triangular 

 at base, rough-wrinkled with short elevated ridges ; disk obsolete. — 

 Pine-barrens, damp sand, and wet rocks, Mass. to Ont., Minn., and 

 southw. July-Sept. (W. I.) Fig. 838. 



17. KOBRESIA Willd. 



Spikelets unisexual and one-flowered, or with two flowers (one 

 pistillate, one staminate) in short spikes aggregated in elongate 

 heads or panicles ; the pistillate flower consisting of a spathiform 

 glume (homologous with the perigynium of Carex) wrapping about 

 the base of the achene and subtended by the scale of the spikelet. — Perennial 

 herbs of northern regions, resembling the first group ( Vigneae) of Carex, but 

 with the perigynium replaced by the open glume which has its margins connate 

 ftt base. (?famed for von Kobres, a nobleman of Augsburg and patron oi 

 botany in Willdenow's time.) 



1. K. elachycdrpa Fernald. Densely tufted ; the wiry compressed culms 2-5.fi 



837. S. retie,. 

 V, pubescens. 



, 0.3-1 



