40 MISSOURI BOTANICAL GARDEN. 
diversifolia of Engelmann. Specimens called diversifolia 
by collectors are, without exception, phyllodial or imma- 
ture plants, from deep or running water, and belonging 
mostly to form c. 
S. LATIFOLIA PUBESCENS (Muhl.) J. G. Smith, Mem. Torr. 
Bot. Club, Vol. 5: 25 (1894). 8. pubescens Muhl. Cat. 
86 (1813). W&. sagittifolia var. pubescens Micheli in 
DC. Monog. Plan. 3: 69 (1881). WS. variabilis var. 
pubescens Engelm. in A. Gray, Man. Ed. 5, 493 
(1867). 
Monoecious or dioecious, erect, 3 to 5 dm. high; leaves 7 
to 15 or 25 cm. long, broadly ovate, rounding to the 
abruptly acute apex; bracts and sepals ovate, obtuse, pubes- 
cent or woolly ; leaves, and especially the scape, from pube- 
rulent or minutely hirsute to densely pubescent; scape 
often very slender; achenium 2 to 3 mm. long; fruiting 
head 8 to 15 mm. in diameter; fertile pedicels as long as 
or shorter than the sterile. — Outasio to Florida, from the 
mountains to the coast. There are three quite well marked 
forms. — Plate 8. 
form a. — Habit of form a of the species; leaves large, 
obtuse; achenium costate-angled, 3 mm. long. This un- 
doubtedly represents Muhlenberg’s type.— From Delaware 
northward. 
Specimens examined from Ontario (Macoun, Bay of Quinte, 1877, very 
close to form a of the species, but with pubescent bracts); Pennsylvania 
(Darlington; Canby, Chester Co., 1863); Delaware (Canby, 1863). 
form b. — Leaves smaller, 7 to 15 em. long, light green, 
sub-coriaceous ; bracts and sepals densely pubescent ; achenia 
2.5 mm. long, smooth on the sides. — The common form 
in the mountains from Virginia southward. 
Specimens examined from Virginia (A. H. Curtiss, 1871; Small, 1892; 
Britton and Vale, 1892); North Carolina (Rugel, 1842; J. D. Smith, 
1881; McCarthy, 101, 1885; Boynton, 1888; Kofoid and Beardslee, 1891) ; 
South Carolina (Ravenel, 1869). 
Form c.— Seape simple, sooner with the fertile pedi- 
14 
