170 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM, 
Spikes inconspicuous, not more than 5 mm, long; sporophylls ovate-lanceo- 
late, cymbiform, 0.9 mm. wide above the base, minutely 6 to 12-ciliate on the 
margins, otherwise similar to the stem leaves. 
Megasporangia 0.G min. in diameter, arranged on the ventral side of the 
spike; meguspores subrugose-tuberculate, yellow, 0.36 mm. in diameter; micro- 
sporangia arranged on the dorsal side of the spike. reniform, flattened, 0.75 
mm, in diameter; microspores 0.04 mm, in diameter. 
There is a duplicate of the type in the herbarium of the New York Botan- 
ical Garden: “In locis humidis montium ad Broad River, Carolina Sept. legit 
Rugel, July, 1841.” 
Fig. 68.—Details of Selaginella tortipila. u, Dorsal view of leaf; b, ventral 
view; c, dorsal view of sporophyll; d@, ventral view; e, commissural face of 
megaspore; f, outer face. From specimen collected at Caesars Head, South 
Carolina, August 6, 1881, by John Donnell Smith; U. 8. Nat. Herb., no. 
154689. Scale 30, 
Other specimens examined are: 
SouTH CAROLINA: Exposed rocks, Caesars Head, Green County, alt, 1,350 
meters, Smith (N, G, Y); Engelmann (M); Redfield (M). Table Rock, 
Gray & Carey (G). Without definite locality, Ravenel (G). 
DISTRIBUTION: On granite (?) rocks, mountains of South Carolina. 
The characters noted in the key serve as ready marks of distinction between 
this species and the next. The relatively thick leaves and tortuous awns 
effectually distinguish this plant from ail other eastern species. 
EXPLANATION OF PLATH 21,—NSelaginella tortipila. Specimen collected on Caesars Head, 
South Carolina, Sept. 2, 1876, by Engelmann; Herb. Missouri Bot. Gard., no. 46797. 
Natural size. 
