SELAGI NELL ACE AE 57 



small bract-like and appressed awl-shaped leaves) bearing a single cylindrical 

 spike. — Wet pine-barrens, N. J. to Va., and southw, 



IL L. complanatum L. Bootstock nearly superficial ; stems erect, irregu- 

 larly branciied or forked, the branches very flat, more or less glaucoas. few- 

 forked, the divisions (0.5-1.5 dm. long, 2-4 mm. wide) erect or but slightly 

 spreading, all clothed with minute imbricated-appressed awl-shaped leaves in 4 

 ranks wkh decurrent adnate bases, the lateral with tooth-like tips ; peduncles 

 (about 3 cm. long) bearing 1-3 erect spikes. — Dry coniferous woods, Nfd. to 

 Me,, Ida., and Alaska. (Eurasia.) 



Var. flabellif6rme Fernald. (Grouxd Fixe.) Brighter green ; the branches 

 several-forked and spreading in a fan-like manner, the terminal divisions 

 0.5-4 cm. long and 1.5-3 mm. broad ; peduncles (averaging 7 cm. long) mostly 

 4-spiked. — liry woods, X. S. to W. Va., Ky.. la., and Minn.; common. Var. 

 WiBBF:i Haberer is a form with peduncles only 1-spiked. — N. Vt. and centr. 

 N. Y. 



12. L. tristachyum Pursh. Very glaucous ; rootstock deep (5-12 cm. 

 below the surface) ; stems erect, the branches numerous, crowded, erect, 1-2 

 mm. broad ; peduncles (8-12 cm. long) with a few scattered attenuate bracts 

 and bearing 1-5 (mostly 4) spikes. (L. Chamaecyparissus A. Br. ; L. compla- 

 natiim, var. Chamaecyparissus Milde.) — Dry sandy soil, n. Me. to Del., and 

 L. Superior; southw. in the mts. to N. C. (Eu.) 



SELAGINELLACEAE 



Leafy plants, terrestrial or rooted in mud, never very large; stems branch- 

 ing; leaves small and -it-6-rowed ; sporangia one-celled, solitary, axillary or 

 borne on the upper surface of the leaf at its base and enicrapped in its margins, 

 some containing large spores (macrospores) and others small spores {micro- 

 spores). The macrospores are in the shape of a low triangular pyramid with a 

 hemispherical base, and marked with elevated ribs along the angles. In ger- 

 mination they develop a minute prothallus which bears archegonia to be fer- 

 tilized by antherozoids developed from the microspores. 



1. SELAGINELLA Beauv. 



Fructification of two kinds, nameh', of minute and oblong or globular spore- 

 cases, containing reddish or orange-colored powdery microspores ; and of 

 mostly 2-valved tumid larger ones, filled by 3 or 4 (rarely 1-6) much larger 

 globose-angular macrospores ; the former usually in the upper and the latter in 

 the lower axils of the leafy 4-ranked sessile spike, but sometimes the two kinds 

 on opposite sides all along the spike. (Name a dimiiuitive of Selago, an 

 ancient name of a Lycopodium, from which this genus is separated, and which 

 the plants greatly resemble in habit and foliage.) 



* Leaves all alike and uniformly imbricated ; those of the spike simila7\ 



1. S. selaginoides (L.) Link. Sterile stems prostrate or creeping, small and 

 slender ; the fertile thicker, ascending, simple (3-8 cm. high) ; leaves lanceolate, 

 acute, spreading, sparsely spinulose-ciliate. (S. spiuosa Beauv.) — Wet places, 

 Xfd. to N. H. (Pursh). Mich., L. Superior, Col., and northw ; rare. — Habit of 

 Lycopodium inundatum. Leaves larger on the fertile stems, yellowish-green. 

 (Eu.) 



2. S. rupestris (L.) Spring. Much branched in close tufts (2-() cm. high) ; 

 leaves densely appressed-imhricated, linear-lanceolate , convex and with a grooved 

 keel, minutely ciliate, bristle-tipped ; those of the strongly quadrangular spike 

 rather broader. — Dry and exposed rocks, somewhat local but not raiv. — 

 (irayish-green in aspect, resembling a rigid moss. (Eurasia.) 



