THE GENUS CRATAEGUS IN COLORADO 45 
Colorado—conical, lobes serrulate. 
Erythropoda—lobes slender, entire. 
Cerronis—calyx-tube only 2-3 mm. long, shorter than its lobes; lobes ovate, with a broad 
gland-margined acumination. 
Coloradensis—calyx-tube very short, hirsute, its narrow lobes cut into long slender nearly 
cylindrical gland-tipped teeth. 
STAMENS AND STYLES 
Occidentalis—(no mention). 
Chrysocarpa—stamens 10, styles 3-4. 
Colorado—stamens Io, equalling the 2-3 styles. 
Erythropoda—(no mention). 
Cerronis—stamens few (1-8, mostly 5-8); anthers large, purple, pistils 5. 
Coloradensis—stamens 10, about 5 mm. long; styles stout, mostly 3, rarely 2 or 4. 
FRUIT 
Occidentalis—oval-globose, about 1 cm. long. 
Chrysocarpa—very abundant, golden yellow, orange, or reddish, 8-9 mm. long, generally 
not quite so thick; nutlets 3-4. 
Colorado—very abundant, at length glabrous, bright glossy red, 6-7 mm. thick; nutlets 
2-3. 
Erythropoda—glabrous, 7-8 mm. thick, orange, red, or red and orange. 
Cerronis—nutlets 5. In Proc. Biol. Soc. Wash., December, 1904, p. 176, it is stated that 
the fruit is black, mostly less than 1 cm. in diameter, the amount of pulp small; 
carpels usually dissimilar, some of them being laterally flattened. (The statement 
that the fruit is black applies only to dried specimens; in the fresh state it is red. 
Mr. D. M. Andrews tells me that when quite ripe it gets a dark purplish red, verging 
on chocolate.) 
Coloradensis—mature fruit large, 10-13 mm. diameter, dark scarlet red, tipped with the 
persistent calyx-lobes and filaments, the pulp juicy and well-flavored, the 2-4 (mostly 3) 
nutlets rather large, slightly ridged on the back. 
Typr-LocaLity 
Occidentalis—Golden, collected by E. L. Greene. (The Nebraska specimens cited belong 
to another species; fide Eggleston.) 
Chrysocarpa, colorado, erythropoda.—‘foothills of the Cache la Poudre Mountains, at 
about 6,000 ft.,”” collected by Ashe, August 20, 1899. 
Cerronis—Cerro Summit, Colorado, prox. 2,500 m., flowers June 7, fruit July 12, rgor, 
collected by Baker. Also cited from near Boulder, collected by Ramaley. 
Coloradensis—Gregory Canyon, Boulder, collected by Andrews. 
