CT2 LYCOI'ODIACK^. (CLUB-MOSS FAMILY.) 



* * Sterile poiiion of the fmnd long-pet iolcci J rmn near the base oj" the common .italic. 



5. B. lunarioides, Swartz. StL-rile ])ortioii of tlic frond pctioled from 

 near the l)aso, 2 -S-turuato, or tin- ultimate divisions often pinnate or pinnately 

 parted, broadly triangular in ficneral outline ; the lobes or divisions obovatc, 

 somewhat kitlncy-shajjed, roundish or oblonjr, somewhat crenatc; fertile stalk 

 3' -6' hijjjh ; the fertile ])art mostly 2-i)innate. (IJtJtrypns lunario'idcs, J//c/(r. 

 Botrychium fumarioules, Willd.) — Dry and rich woods, especially southward. 

 July. — A state from Ilinj^ham, Massachusetts ( C. .7. S/irarpie), has the two 

 lateral primary divisions of the sterile scj^mcnt chanj^ed into long-stalked 

 fertile fronds. 



Var. obliquum (B. obliquum, ^fllhl.) is mostly larger (C- 17' high) ; the 

 fructification mure compound; the sterile segment with oblong or lanceolate 

 divisions, citiier obtuse or oblique at the base, nearly entire, toothed, or irregu- 

 larly pinnatitid. — New England to Wisconsin, and southward: rather scarce. 



Var. dissectum (B. disscctum, Muhl.) has the divisions of the sterile 

 segment compoundly and laciniatcly cut into narrow small lobes and teeth : 

 otherwise as the last, into which it i)asses, and with which it grows. 



22. OPHIOGLOSSUM, L. Adder's-Tonguk. (Bl. 19.) 



Mode of growth much as in Botrychium ; but the coriaceous sporangia con- 

 nate and coherent in two ranks on the edges of a simple spike, which in our 

 species is single and placed on a stalk rising from the base of the simjile and 

 reticulated- veined sterile segment. Spores cojjious, sulphur-color. (Name 

 compounded ofocpis, a serpent, and yXclxrcra, tonr/iu.) 



1. O. VUlgatum, L. Sterile segment ovate or ciliptieal-oblong (2' -3' 

 long) rather fleshy, obtuse, narrowed at the base, and sessile near the middle 

 of the stalk of the fertile spike. — Bogs and meadows: not common. July. — 

 Stalk 6'- 12' high, rising from a short oblique rootstock, the bud not enclosed 

 in the base of the stalk. (Eu.) 



Order 131. I^YCOPODIACE^. (Club-Moss Faahly.) 



Low plants, usually of Moss-like aspect ; loith pretty larije spore-case& 

 (sporangia or sporocarps) sessile in the axil of .simple and sessile, persi.^tent, 

 mosdy aid-shaped or lanceolate leaves: — of three genera, including tlie 

 aquatic and peculiar Isoiitcs. 



* Terrestrial, with erect or creeping steins : spore-cases free in the axils of the leaves. 



1. LycopOfliiiin. Spore-cases all of one sort, coriaceous, mostly kidney-shaped, 2-valved, 



filled with innumerable minute spores. 



2. Selaginella. Spore-ca.<!es of two sorts; one very small, oblong or globular, 2-viilveil, 



filled with innumerable minute spores ; the other larger, 3 -4-ralved, contaiuing 3 or 4 

 large spores. 



* # Aquatic, with a corm in place of stem, covered above with the dilated bases of the tufted 

 long and rush-like leaves, to which the f pore-cases adhere. 



3. Isoetes. Spore-cases of two sorts ; one containing numerous large, the other numerous 



small spores. 



