102. LYCOPODIUM. 2. RHOPALOSTACHYS. b. DIPHASIUM. 51 



the lower plane) very distant, placed apparently in a single row, erected, 

 subulate, nearly flattened; dorsal leaves (those of the upper plane) placed 

 alternately in 2 close rows, in shape intermediate between the lateral 

 and ventral ones. Spikes unknown. 

 Celebes. 



(47) Ei. coinplanatum, I*., Spring, Hon., I, 101; Rac., Flor. 

 Btz., I, 244; Schk., Krypt. Gew., I, tab. 163; L. thuyoides, Bl, Enum., 263. 



Main stem wide-trailing and rooting, sparsely leafy; branches rather 

 flattened, ascending, copiously flabellato-dichotomous, bilateral, the ultimate 

 ones 2*2 10 cm. long, 2 mm. broad including the lateral leaves. Leaves 

 of the main stem uniform, shortly subulate, adpressed, decurrent; of the 

 branches generally distinctly dimorphous, sometimes resembling those of 

 L. Wightianum Watt., 4-farious, green, rigid; lateral leaves broadly 

 decurrent, 2 mm. long, subulate, ascending, the upper (inner) side 

 conduplicate-canaliculate ; dorsal and ventral leaves smaller, linear, adpressed, 

 the dorsal the largest, more or less imbricate, the ventral the smallest, 

 remote. Spikes cylindrical, 2Va 5 cm. long, several (2 16) on a common, 

 branched peduncle from the axis of a branch, the peduncle foliate with 

 sparse, ascending or spreading, radially arranged, subulate bracts; sporo- 

 phylla broadly ovate, ascending, shortly acuminate. L. thuyoides Bl. 

 is the form with the longest ultimate branchlets and the most copiously 

 branched fertile peduncles. 



North temperate zones and cool alpine regions of the tropics. 



(48) Ei. Wightiauum, Wall., Spring, Hon., I, 103; Rac., Flor. 

 Btz., I, 245; L. sabini folium, Bl., Enum., 263. 



Main stem (rhizome) wide-trailing, rooting, wiry, terete, sparsely 

 leafy, the leaves minute, scale-like, subulate, adpressed ; branches ascending, 

 simple and sparsely leafy at the base, copiously and more or less 

 flabellately compound in the upper part, 5 20 cm. long, the branchlets 

 rather compressed, relatively short, crowded, often spreading or nutant. 

 Leaves of the branches 4-farious, erect, to 2V mm. long, acute, entire, 

 distinctly canaliculate on the inner side, densely imbricated, rigid, not 

 rarely somewhat dimorphous and then the lateral leaves falcate, ascending, 

 canaliculate. Spikes terminal on the branchlets, cylindrical, 2V 5 cm. 

 long, sessile on a simple or sometimes forked peduncle 5 10 cm. long 

 and provided with lax, subulate or lanceolate, acute bracts to 4 mm. 



