88 Rhodora’ [May 
plicem vel ramosam multo supereminentibus, capitibus vel ramis 
plane axillaribus; bracteis patente ascendentibus, infima 2.5—4 dm. 
longa; capitibus femineis sessilibus vel infimis pedunculatis, ad 
maturitatem circiter 3 cm. diametro; tepalis ad stipitem | affixis, 
ligulatis, apice dilatatis et rotundis, subintegris vel erosis; costa 
media prominente et in apice suo incrassata; fructubus maturis lucidis, 
olivaceo-brunneis, breviter stipitatis, corpore subterete, 5-6 mm. longo, 
2-3 mm. crasso; stylo subulato-filiforme, 5-7 mm. longo, parte lineare 
stigmatica adunca, 2.5—4 mm. longa. 
Plant 7.5-9 dm. high: leaves 5-12 mm. broad, erect, firm and 
opaque, strongly carinate, much overtopping the simple or forking 
inflorescence: the heads or branches strictly axillary: bracts spread- 
ing-ascending, the lowest 2.5-4 dm. long: pistillate heads sessile, 
or the lowest peduncled, in fruit about 3 cm. in diameter: tepals 
attached to the stipe, ligulate, with dilated and rounded sub-entire 
or erose tips; the midrib prominent and thickened at its apex: 
mature fruits lustrous, olive-brown, short-stipitate; the subterete 
body 5-6 mm. long, 2-3 mm. thick: style subulate-filiform, 5-7 mm. 
long; the linear stigmatic portion hooked, 2.5-4 mm. long. — Mass- 
AcHUSETTS, small pond, Medford, July 29, 1860 (Wm. Boott); 
muddy shore of Half-way Pond, Barnstable, August 23, 1888 
(W. Deane): PENNSYLVANIA, ditches, Philadelphia, September, 1876 
(I. C. Martindale): tutors, without station (S. B. Mead): Mis- 
SOURI, Springfield, September 1, 1893 (J. W. Blankinship in hb. 
Deane). 
* * One or more of the pistillate heads supra-axillary. 
+— Erect plants of shores and swamps: leaf-blades of uniform texture, some- 
what translucent and reticulated under a lens. 
S. DIVERSIFOLIUM Graebner. Erect, stoutish, 3-6 dm. high: 
leaves delicate, cellular-reticulated on both sides, 4-9 mm. wide, 
with a broad scarious margin toward the base: bracts strongly 
ascending, the lowest 2-5 dm. long: inflorescence mostly simple, 
rarely with 1 or 2 weak branches: pistillate heads 2 to 4, chiefly 
sessile, the lower remote and supra-axillary, in fruit 2-2.5 em. in 
diameter.— Graebner in Sehrift. naturf. Ges. Danzig, N. F., ix. (1895) 
335, t. 8, fig. 1, and in Engler, Pflanzenr, iv. no. 10, 21, fig. 4 F. 
(1900). S. simplex in great part of Am. auth., not Hudson.— East- 
ern Quebec to South Dakota, Connecticut and Illinois and probably 
southward; also in Europe. Passing to 
Var. acaule (Beeby), n. comb. Dwarf, 1-3 dm. high: leaves and 
bracts comparatively narrow; the lowest strongly ascending bract 
1-3 dm. long: pistillate heads 1.5-2 cm. in diameter, usually crowded. 
— S. simplex, var. acaule Beeby in Macoun, Cat. Can. Pl. ii. 367 
(1890). S. diversifolium, proles nanum Graebner in Engler, Pflan- 
zenr. iv. no. 10, 21 (1900). S. nanum Fries according to Graebner, 
l. c. (1900).— Newfoundland to Iowa and West Virginia. 
