THE ROYAL BOTANTC GARDEN, EDINBURGH. U3 
(t>) Tetragon ost achy a?. — Bracts in four rows, 
2. Selaginella rupestris, Spring. {Lycopodium rupestre, Willd.) 
Widely distributed over the globe, being found in North 
and South America, South Africa, and the East Indies, but 
not in cultivation in this country, so far as I know. 
B. Tetrastich^.— Leaves (and bracts) in four rows. 
3. Selaginella nliginosa, Labill. From Australia and New Zea- 
land. Not uncommon in gardens and nurseries under the 
name of Lycopodium nUginosum. A very easily distin- 
guished species, of long slender form, with long stiff leaves 
arranged in four rows, the leaves being opposite, and de- 
cussate. 
4. Selaginella pumila, Spring. {Lycopodium pumilum, Schlecht. 
L. pygmanm, Kaulf. L. bryoides, Kaulf.) A very small 
South African species, of which I have only seen dried spe- 
cimens. 
II. DiciioTROPiE, A. Br. (Heterophyllre, Spr.) 
Leaves dimorphous, in four rows ; bifarious, 
• Tetragonostachy.e, Hook, and Grev— Bracts homomorphous ; 
spikes tetragonal. 
(") Continue, Spr.— Stem not jointed (continuous) ; rootlets 
posterior. 
a. Repentes.— Sin 
with 
and producing buds (innovations) at the apex; haves dimorphous, 
bifario'us. 
* Sparsely branched ; spikes terminal. 
5. Selaginella apus, Spr. (L. apodnm, L., L. brasiliensis, Raddi). 
A well-known garden species, occurring in small green 
tufts. A native of North America. 
6. Selaginella Litdoviciana, A. Br. (S. apns, y. denticulata, S. 
apotltesa, S. apof/ieca, S. Louisiana, Hort.) A much larger 
species than S. apus; the leaves with a white margin. A 
native of the southern part of North America. (S. apoihecia, 
Hort. Veitch.) 
M 2 
