Selaginella rupestris. 
Selaginella rupestris Spring, 1840. in Fl. Brasil. 
1: pt. 2. 118. Haton, |. c..698. Underw. in 111. 
Fl. 1:44; Nat. Ferns 127; in Britt. Man. 26, 
Clie, Vice E20. 
Plants 3-10 cm. high, growing in colonies; stems slen- 
der, 1 mm. or thicker, with numerous short, very leafy 
branches; leaves imbricated, many-ranked, awl-shaped, 
awned, about 2 mm. in length. 
Onrocks. 
_ Baltimore Co. Md., Waters; Great Falls, Palmer; 
Stony Man Mt., Steele, Palmer, King. 
tt Lateral leaves spreading. 
2. S. apus (L.) Spring. 
Lycopodtoides denticulatum pulchrum repens, 
spicts apodibus. . Dll. Hist. 467. t. 64. f. 2. 
Lycopodium apodum L. Sp. Pl. 1105. 
Selaginella apus Spring, \.c. 119. Haton |. c. 
698. Underw. in Ill. Fl. 1:45; Nat. Ferns 141 ; 
in Britt. Man. 27. Clute, l. ¢. 155. 
Plants delicate, with whitish, barely 5 mm. thick 
branches ; leaves pellucid, light green, the lateral ones 
ovate, about 2 mm. in length, those of the upper and 
lower faces smaller, lanceolate, appressed; the upper 
leaves similar, crowded, enclosing the minute sporangia. 
In moist, shaded places. 
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