52 Rhodora (MARCH 
- 
perigynium strongly nerved, firm and shining, orbicular to ovate, 
very turgid, 6 to 9 mm. long, contracted to a slender conic-cylindric 
short-toothed beak, spreading and much exceeding the acute or 
bluntish scale. — Riedgr. Nachtr. 85, t. Uuu. fig. 166; Carey in Gray 
Man. 566 ; Boott, Ill. i. 15, t. 41; Bailey, Proc. Am. Acad. xxii. 68. 
C. cylindrica, Schw. acc. to Boott, l. c. C. Greenii, Boeckeler, Flora, 
1858, 649. — Swales and wet meadows, Southern Maine to Pennsyl- 
vania and So. Carolina. Occasionally smooth-beaked specimens 
occur but these can be distinguished from C. Zuckermani by the firm 
texture of the perigynium and its peculiar yellow-green color. 
Var. Olneyi.  Coarser, the leaves 4 to 6 mm. wide: pistillate 
spikes mostly 2, cylindric, more densely flowered, 2.5 to 5 cm.-long, 
1 to 1.5 cm. thick: perigynium duller, more ascending and smaller 
than in the species. — C. O/ncyi, Boott, Ill. i. 15, t. 42; Gray, Man. 
ed. 3, xcvii. C. budlata x utriculata, Bailey, Proc. Am. Acad. xxii. 
68, & in Gray, Man. ed. 6,595. C. monile, Britton, Bull. Torr. Club, 
xxii. 221, not Tuck. — Massachusetts to Delaware. MASSACHUSETTS, 
Tophet Swamp, Lexington, (Wm. Boott) ; Southbridge (A. M. 
Harper): RuopE IsLAND, Providence (S. 7: Olney): DELAWARE, 
Blackbird and Townsend ( W. M. Candy). 
C. LUPULINA X BULLATA, Fernald. Coarse as in C. /upudlina: 
pistillate spikes 3 cm. broad: perigynium firm as in C. du//ata, but 
large and dullas in C. Zupu/ina. — Rhodora, ii. 170. — MASSACHU- 
skrrs, Medford (Wm. Boott). 
— = Beak of perigynium smooth (rarely a little serrulate in C. retrorsa). 
a. Mature perigynium 5 to 6.5 mm. thick. 
C. TUCKERMANI, Dewey. Culms slender, 1 m. or less long, form- 
ing loose stools: leaves 3 to 5 mm. wide, the bracts very leaf-like 
and usually much exceeding the culm: staminate spikes 2 or 3, long- 
peduncled; pistillate 2 or 3, slender-peduncled or the upper sessile, 
cylindric-oblong, 2 to 6 cm. long, r.2 to r.8 cm. thick, loosely 
flowered: perigynium glossy, extremely membranaceous and bladder- 
like, strongly nerved, globose-ovate, 1 cm. long.tapering gradually to 
the slender cylindric beak, much exceeding the oblong-ovate acute 
or acuminate scale. — Am. Jour. Sci. xlix. 48, fig. 117; Boott, Trans. 
Linn. Soc. xx. 115. & Ill. i. 15, t. 4o; Gray, Man. ed. 5, 601; Bailey, 
Proc. Am. Acad. l. c. & Mem. Torr. Club, i. 72. C. bullata, Dewey, 
Am. Jour. Sci. ix. 71, not Schkuhr. C. cylindrica, Carey in Gray, 
Man. 566.— Rich alluvium, New Brunswick, Maine, the White 
Mountains, and the Connecticut Valley to New Jersey, Indiana, 
Minnesota, Ontario and Lake St. John, Quebec. 
b. Mature perigynium not more than 4 mm. thick. 
1 Perigynium ascending, straight (C. refrorsa, var. Macounit may be 
looked for here). 
C. VESICARIA, L. Comparatively slender, o.4 to 1 m. high, the 
