﻿Underwood : The terxate Species of Botrychium 537 



There is a single specimen in the Columbia Herbarium which is 

 also to be referred here. It is possible that there is an earlier 

 name for the species, but we have not been able to find any. Not- 



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anywhere near doing so, and one must have defective vision to 

 think of confusing the two species even though they are both 

 forms with narrow segments. 



To the above list of species, all of which, with the single ex- 

 ception of B. daucifolium, have been confused with B. tematum at 

 one time or another, we are obliged to add three more : 



12. Botrychium Coulteri sp. nov. 



A stout fleshy plant growing in geyser formations. Roots 

 numerous, fleshy, stout ; stem very short, 2-3 cm. long, very 

 stout, 1.5-2 cm. in diameter, swollen with the contained bud of 

 the succeeding season, soon dividing to form the sterile and fertile 



laminae 



5 



stout, sulcate in drying ; sterile lamina about 1 5 cm. wide, the 

 central portion about 9 cm. long, this and the lateral ones tripin- 

 nate, or quadripinnatifid ; segments obliquely ovate, 1 cm. or more 

 long, 0.5 cm. or more wide, thick, fleshy, the margin entire or 

 slightly repand ; veins few, scarcely perceptible ; petiole of the 

 sporophyll about 17 cm. long including the panicle ; panicle quad- 

 ripinnate below, the pinnae crowded, gradually simpler above; 

 sporangia very numerous, bright yellow ; spores copious, pale 

 yellow. 



The leaf persists well into the second season, the new stem 

 growing through the base of the old, the marginal portion of 

 which surrounds it like a sheath; the plant is slightly hairy 

 throughout when young ; the bud is very large, and somewhat 

 hairy at the margins of the pinnae but not densely pilose like that 

 of B. obliqunm. The sporophyll is not uncommonly double. 



In geyser formations near a stream in open places, Yellow- 

 stone National Park, P. A. Rydberg and Ernst A. Bessey, 7 

 Aug. 1897. Dr. Rydberg and his assistant collected some 150 

 specimens of this interesting species. It was apparently first col- 

 lected by Dr. John M. Coulter, at Lower Fire Hole Basin, 1872, 



f Annals of Botany, 5 : 500. 189I ; New Ferns, 117 



