Hckujindlu. SELAGINELLE.E. 349 



OiiUKii LYCOPODIACK/E, tlic Club-Moss or (Jrountl-Pine Fiunily, is character- 

 izotl by tlio smtiU loaves, usually lanceolate or subulate, souietiiucs oblong or round- 

 ish, not divided, persistent, placed in 2 to many rows on trailing or sometimes erect 

 usually branching stems, and by the 1 - 3-celled S[)orangia solitary in the axils of the 

 leaves or on their upper surface, all filled with numerous minute spores, and sej)a- 

 rating into 2 or 3 valves when mature. Prothallus [in the only known instance] 

 underground and without chlorophyll. 



An order of tluoc genera, Li/cnpndiuni, Tinrsiptcris and Psilotiun, the latter of very few species, 

 the first munberiiig alwut 100, of wliich 11 are found in North Anieiiea. Tlie genus LvcoPOUiUM, 

 Linn., consists of moss-like plants, with leaves varying from round to slenderly subulate and 

 imbricated in 4 tO many rows on the pinnately or dichotomously branching stems, and with reni- 

 form 1-ccllcd sporangia opening transversely, situated in the axils of the ordinary leaves, on the 

 fruiting leaves modiiicd into bracts and the fructification forming stalked or sessile spikes. No 

 species is known to liave been as yet found in California, but the following may be looked for on 

 the mountains of the northern part of the State. Both liave distinct spikes of fructification. 



L. ANNOTINUM, LiiiH. Stems creeping; branches U[iright, dichotomous, 4 to 6 inches high: 

 leaves in soveial ranks, spreading, lanceolate, pointed, serrulate, 2 to 4 lines long: spikes solitary 

 at the ends of leafy branches. — Washington Tenitory, northward to Unahiska and eastward to 

 the Atlantic. 



L. CLAVATUM, Linn. Stems widely creeping ; branches upright, subpinnately branched, 4 to 8 

 inches high : leaves many-ranked, linear-subulate, spreading, but with the apex incurved and 

 bristle-pointed : spikes 2 to 4 together on a slender terminal peduncle. — Same range as the last. 



Tmksiptekis Fousteiu, Endlicher, an Australasian plant, nearly a foot high, with vertical 

 oblong leaves half an inch long, some of them 2-lobed and bearing in the fork a large 2-celled 

 sporangium, is accredited to California in Hot. Ueechej', and there are specimens at Kew marked 

 "California, Douglas" ; but there is no recent evidence that it is a Californian plant. 



Division II. HETEHOSPOUOUS VASCULAR ACIIOGENS. 



Plant producing two kinds of spores ; the larger ones (ynacrospores) developing a 

 prothallus with archegonia; the smaller ones (7nic>-ospor€s) producing antherozoids. 



Order CXXIII. SELAGINELLE^. 



Leafy jdants, terrestrial or rooted in mud, never of great size ; the stems bninching 

 or corm-like, and the leaves minute anil arranged in four rows or subulate and 

 elongated. Sporangia one-celled, solitary, axillary or borne on the upper surface of 

 the leaf near its ba.se and enwrapped by its margins, some containing macrospores 

 only and others only microspores. 



1. SELAGINELLA, Bi:auvois. 



Sporangia axillary, minute, sul)globose, opening transversely ; some containing 



usually 4 globose macrospores, others, which are smaller and more abundant, Idled 



with inimerous microspores. — j\ros.s-liko plants with slender branching stems and 



small leaves arranged in 4 or several mnks. 



The lunnber of species described is over 200, the greater part tropical. Many of them are very 

 elegant, anil a few are common in conservatories. 



* Leaves all alilcc, arranged in manij ranka, thoxe of the fruiting spikes ^-ranked, 

 but otherwise like the rest. 

 L S. rupestris, Spring. Stems ]irostrate or ascending, rather rigid, 2 to 12 

 inches long, vaguely or subpinnately branching : leaves glauceseent, closely indjri- 



