a I ee EMER Re OE ae LN Yee Se ETE ee ecg mae 
116 PROCEEDINGS OF THE AMERICAN ACADEMY 
Mo. Bot. Garden, 
18s93 
VIII. 
CONTRIBUTIONS FROM THE GRAY HERBARIUM OF HARVARD 
UNIVERSITY, NEW SERIES. 
IV. NEW AND LITTLE KNOWN PLANTS COLLECTED 
ON MT. ORIZABA IN THE SUMMER OF 1891. 
By Henry E. Seaton. 
Presented by B. L, Robinson, January 11, 1898. 
Tue descriptions of new species and notes upon a few other plants 
of interest presented in this paper are based upon a collection made by 
the author on Mt. Orizaba in July and August, 1891. Mt. Orizaba 
in the State of Vera Cruz has been visited by a number of collectors, 
and is among the best known regions in Mexico. This is especially 
true of its lower slopes in the vicinity of the towns of Cordoba and 
Orizaba. These regions, where the writer’s first collections were also — 
made, are on the southeastern slope of the mountain at altitudes of 
2,700 and 4,000 feet. Higher points were successively visited, until 
the station of Esperanza was reached, on the southern slope of the 
mountain and at an altitude of 8,000 feet. In this region seven of the 
new species here described were discovered. The ascent of the peak 
to an altitude of 14,000 feet was made on the western slope above 
the town of Chalchicomula. The remaining new species were found 
between 9,000 and 12,000 feet. 
Drs. J. M. Coulter and J. N. Rose have been so obliging as to de- 
termine some of the Umbellifer, and their descriptions of two new 
species are herewith given. The notes upon the Grasses are kindly 
furnished by Prof. F. Lamson-Scribner. Warmest thanks are also 
due Dr. B. L. Robinson, for his ready assistance in many of the deter- 
minations. 
Ranuncutus cromes, HBK. Pine woods, Mt. Orizaba, 11,000 ft., 
August (no. 179). This species has been somewhat confused with 
R. Hookeri, Schl., but is distinguished by its more simple habit, 
smaller and sastie 3-lobed or ae radical ae and. — : 
narrower petals. 
