60 102. LYCOPODIUM. § 2. BHOPALOSTACHVS. b. DIPHASIUM. 



4. J. Leaves in 2 planes, the largest laterally, the smallest dorsaUy 



(not ventrally) arranged. (49) L. scariosum. 



3.3. Barren and fertile regions separate, the latter forming panicles 



apart from the former. (50) L. volubile. 



(45) L<. carollnianum. I,., Spring, Mon., I, 98; Bk., Fern AIL, 

 28; Engl. & Prantl, Nat. Pfl.Fam., P, flg. .378. 



Main stem trailing and rooting, 5 — 30 cm. long, bearing distant, 

 short, simple, spreading, decumbent branches. Leaves secund or nearly 

 so, crowded, ' dimorphous, 4 — 6 mm. long, acute, the lateral (posterior) 

 ones more or less spreading and falcate, the intermedial (anterior) ones 

 rather ascending, straight. Fertile spikes 1 or few, cylindrical, 2 'A — TVs 

 cm. long, solitary on a simple, stiffly erected, stramineous peduncle 

 5 — 30 cm. long and provided with lax, ascending or adpressed, rigid, 

 acute bracts; sporophylla broad-ovate, toothed, with a long, ascending or 

 spreading cusp. 



Tropical and subtropical. 



(46) 1j. penioillifernm, «. A. r. jr., Bull. Btz., 1914, XYI, 40, 

 tab. X. 



Main stem erect (scandent?), to 85 cm. long or longer, terete, pinnately 

 branched; primary branches ascending, 10 — 15 cm. long, provided on the 

 lower side near the base with a short-stalked, white, brush-like coma 

 consisting of numerous crowded, scariose, subulate leaves subsimilar to 

 those of the main stem; higher branches dichotomous, lower pinnately 

 branched, dichotomous at the 'apex, the secondary branches dichotomous; 

 ultimate branchlets rather flattened, 2 — 10 cm. long and 3 — 4 mm. broad 

 including the lateral leaves. Leaves of the main stem scattered, isomorphous, 

 passing gradually into those of the ultimate branchlets, erected, linear- 

 subulate, coriaceous at the base, otherwise white-scariose and not rarely 

 eroso-denticulate ; leaves of the branchlets heteromorphous, placed in 3 

 parallel planes, the lower Vi coriaceous, green, distinctly decurrent, separated 

 from the white-scariose upper Vs by a narrow, brown or rufous transversal 

 band ; lateral leaves (those of the central plane) laxly placed in 2 opposite 

 rows, arcuate-ascending, 3 — 5 ram. long, subflliform- or capillary-subulate 

 from a rather broad, involuto-canaliculate base; ventral leaves (those of 



