STANDLEY FLORA OF GLACIER PARK. 255 



Standley, P. C. Sphagnum in Glacier National Park, Montana. Bryologist 23: 5-6. 

 1920. 



Five species reported. 



• Rusts of Glacier National Park, Montana. Mycologia 12: 143-148. 1920. 



Sixty-one species listed. 



• Ferns of Glacier National Park, Montana. Amer. Fern Journ. 10: 97-110. 



1921. 



A popular account of the common plants of the park. 



Williams, R. S. A preliminary list of Montana mosses. Bull. N. Y. Bot. Gard, 2: 

 351-380. pi. 34-39. 1902. 



Numerous species are listed from Glacier Park. 



SYSTEMATIC TREATMENT. 



KEY TO THE FAMILIES. 



I. Pteridophyta. Ferns and Fern Allies. 



Plants without true flowers, reproducing by spores (no embryo being formed); fern- 

 like, mosslike, or rushlike plants. 



Stems hollow, jointed, grooved; leaves reduced to toothed sheaths surrounding the 



joints EQUISETACEAE (p. 268). 



Stems neither hollow, jointed, nor grooved; leaves never reduced to sheaths. 

 Leaves small (1 cm. long or less), very numerous, sessile, awl-shaped or bractlike, 4 

 to many-ranked; plants more or less mosslike. 

 Plants depressed or short-creeping, 3 to 5 cm. high or less; stems slender, not 

 over 3 mm. thick (including the leaves); spores of 2 kinds, megaspores and 



microspores SELAGINELLACEAE (p. 271). 



Plants tall or wide-creeping, often more than 10 cm. high; stems (including the 

 leaves) often much more than 3 mm. in diameter; spores all alike. 



LYCOPODIACEAE (p. 270). 

 Leaves much larger, few, neither awl-shaped nor scalelike, stalked, clustered or 

 solitary; plants not mosslike. 

 Sporangia (spore cases) large, borne in a stalked terminal spike or loose panicle, 



the sterile blade entire or several times divided. 



OPHIOGLOSSACEAE (p. 263). 

 Sporangia very small, borne in clusters (sori) on the back of ordinary foliage leaves 



POLYPODIACEAE (p. 264). 



II. Spermatopbyta. Flowering Plants. 



Plants with true flowers, reproducing by seeds, these containing an embryo. 



I. Trees and Shrubs. 



Leaves needle-like, linear, or scalelike, evergreen (except in Larix); fruit a cone or a 

 berry. 



Fruit a cone or a nearly dry bluish berry PINACEAE (p. 273). 



Fruit a juicy red berry TAXACEAE (p. 272). 



Leaves neither needle-like nor scalelike (except in one small parasitic plant), rarely 

 linear, but the fruit then a capsule. 

 Leaves opposite. 



Plants parasitic upon evergreen trees, very small (5 to 10 cm. liigh). 



LORANTHACEAE (p. 438). 



