SELAGINELLA. ] L YCOPO DIA CE^-E. 471 



Moors and heaths in mountain districts, from Sussex and Cornwall north- 

 wards ; ascending to nearly 3,500 ft. in the Highlands ; frt. June-Aug. 

 Stem stout, rigid, shortly creeping at the base ; branches 2-8 in., ^ ^ in. 

 diam. , densely leafy, erect, strict, obtuse. Leaves erect, appressed, incurved 

 squarrose or spreading, acuminate, pungent or not ; midrib ; upper capsu- 

 liferous sometimes yellower. DISTRIB. Temp, and cold N. and S. regions. 



2. SELAGINEL'LA, Beauv. 



Capsules of 2 kinds, in terminal cones ; 1, minute, oblong or globose, 

 containing microspores ; 2, larger 2-4-valved capsules containing 1-6 

 inacrospores. DISTRIB. Chiefly trop. ; species about 150. ETYM. JDimi- 

 nutive of Selago, an old name for Lycopodium. 



1. S. selaginoi'des, Gray ; decumbent, leaves lax lanceolate and 

 ovate, scales of cone spinulose-ciliate. S. spinosa, Beauv. 

 Bogs and marshes, from N. Wales northwards, and in Ireland ; ascending to 

 nearly 3, -300 ft. in the Highlands; frt. July-Aug. Stems 2-6 in., slender, 

 sparingly branched ; branches ascanding. leaves inserted all round, ^-iin., 

 incurved or squarrose, pale yellow-green, acuminate, midrib obscure. 

 Cones on elongate erect branches, 1-3 in., terete, rather stouter than the 

 branch ; scales erect or spreading, broader and longer than the leaves, with 

 long spinulose teeth. Microspores echinate, in 2-valved reniform capsules. 

 Afacrospores globose in 3-4-valved and -lobed capsules. DISTRIB. N. and W. 

 Europe, Siberia, Himalaya, N. America. 



3. I3OETES, L. QUILLWORT. 



Aquatic or terrestrial stemless plants. Corm depressed. Leaves long, 

 subulate or filiform, often tubular and septate, base sheathing. Capsules 

 sessile in the axils of the leaves, partially enclosed by and adnate to their 

 sheathing bases, traversed by transverse threads ; those of the outer leaves 

 containing globose macrospores, those of the inner oblong 3-gonous micro- 

 spores. Macrospores with a crustaceous integument, marked on the upper 

 hemisphere with 8 radiating lines, and bursting by 3 valves. DISTKIB. 

 Chiefly N. temp, and warm regions ; species 6 or 8. ETYM. fcros and eros, 

 ever-green; of obscure application. 



1. I. lacus'tris, L. ; aquatic, leaves subulate, macrospores covered 

 with crested ridges or tubercled. 



Bottoms of alpine and subalpine lakes, from N. Wales northwards ; ascending 

 to 2,000 ft. in the Highlands ; and in Ireland ; frt. May-July. Corm often 

 as big as a hazel-nut. Leaves 10-20, 2-6 in., rigid, obscurely 4-gonous, dark 

 green, of 4 septate tubes. Capsule ovoid or globose, partially covered by 

 the inflexed edges of the sheath. Macrospores tubercled by the protrusion 

 of the inner wall through perforations of the outer. Microspores granular. 

 DISTRIB. Europe (Arctic) N. of the Alps, W. Siberia, N. America. 



Sub-sp. LACUS'TRIS proper ; leaves erect green, capsules ^ covered by the edges 

 of the leaf-sheath, tubercles of macrospore short. 



Sub-sp. ECHINOSPO'RA, Durieu (sp. ) ; leaves spreading paler, capsules almost 

 enclosed in the leaf-sheath, tubercles of macrospore longer more acute. 



2. I. Hys'trix, Durieu ; terrestrial, leaves filiform, macrosporcs ob- 

 tusely tubercled. /. Duriait, Hook. 



