STANDLEY — ^FLOKA OF GLACIER PARK. 271 



Leaves in 6 or 8 rows, never bluish green, spreading. 

 Erect branches of plants treelike, with numerous small branches. 



3. L. obscurum. 

 Erect branches of plants not treelike, with a few large branches. 



4. L. annotiuum. 

 Fruit spikes on stalks 2 cm. long or longer. 

 Leaves arranged in 4 rows, closely appressed to the stem, the branches thus 



appearing slender and flattened 5. L. complanatum. 



Leaves in many rows, rather loose, the branches rounded . . . 6. L. clavatum. 



1. Lycopodium selago L. Fir clubmoss. Plate 45, A. Under bushes at 

 Sperry Glacier and Gunsight Pass; in sphagnum bog at Johns Lake. Widely dis- 

 tributed in N. Amer. and Eur. — Stems erect, simple or sparsely branched, 10 to 20 

 cm. high; leaves hollow at the base. 



Essentially an alpine species. 



2. Lycopodium alpinum L. Alpine ground-cedar. Under whortleberry bushes 

 along the edge of a rock slide at Snyder Lake. Alaska and B. C. to Que. and Greenl.; 

 also in Eur. and Asia. — ^Main stems creeping, the aerial branches 3 to 10 cm. high, 

 branched. 



A rare species, apparently; known in the United States only from this locality. 

 The pale glaucous branches are strikingly like those of creeping cedar (Juniperus 

 prostrata). In habit the plant is much like L. complanatum. 



3. Lycopodium obscurum L. Ground-pine. In moss in deep woods at Belton. 

 Alaska to Wash., Ind., Newf. and N. C. — Main stems creeping under the ground, the 

 aerial branches erect, bushy, 10 to 20 cm. high; leaves dark green, twisted. 



4. Lycopodium annotinum L. Stiff clubmoss. Plate 45, B. Common in 

 deep moist woods, but more abundant on the west slope. Alaska to Oreg. , Colo. , Greenl. , 

 and Pa. — Main stems creeping above ground, leafy; aerial branches erect, 5 to 30 

 cm. high, simple or forked; spikes one to several. 



This is the only clubmoss which is common on the east slope, and it is not certain 

 that any other species occurs there. The plants usually form large mats of loosely 

 tangled branches. Many of the plants are sterile. 



5. Lycopodium complanatum L. Ground-cedar. Common on the west slope 

 at low altitudes, in deep moist woods; reported from Gunsight Lake. Alaska to 

 Wash., Lab., and N. Y.; also in Eur. — Main stems creeping on or below the surface 

 of the ground, the aerial branches pale green, 4 to 25 cm. high, forking. 



The plants are very slender and creep widely over the ground; the branches are 

 often much twisted. 



6. Lycopodium clavatum L. Running-pine. Plate 46, A. Johns Lake, about 

 the edge of sphagnum bog. Alaska to Oreg., Newf., and N. C; also in Eur. and 

 Asia. — Main stems creeping over the ground, leafy; aerial branches rather thick, 5 

 to 20 cm. high, branched, densely covered with soft leaves; leaves mostly bristle- 

 tipped. 



Our form is L. clavatum monostachyon Hook. & Grev. 



5. SELAGINELLACEAE. Selaginella Family. 



1. SELAGINELLA Beauv. 



Low perennial plants with branching stems; leaves 4 to 6-ranked, very small, 

 imbricate, appressed; spores borne in sporangia sessile in the axils of leaflike bracts. — 

 No species of the genus were seen on the west slope, but they are found almost every- 

 where on the east slope. The plants curl up in dry weather and lose their color, but 



