Some hitherto undescribed plants from New Mexico 



Elmer Ottis Wooton and Paul Carpenter Standley 



During the summer of 1904 and the spring of 1905, Mr. O. B. 

 Metcalfe made a botanical collection of some six or seven hundred 

 numbers about the south end of the Black Range in Grant and 

 Sierra counties of New Mexico. The region is one that was 

 almost unknown botanically before that time. 



Most of the numbers were determined by Dr, E. L. Greene and 

 distributed soon after their collection. They included a number of 

 new species in various genera, most of which have been described 

 by Dr. Greene in volume one of Leaflets. There remained, how- 

 ever, about two hundred numbers which have been recently deter- 

 mined by the writers. Among them a number of apparently un- 

 described plants w^ere found, descriptions of which are here pub- 

 lished. 



The determination of a single species of Sphaeralcea led us to 

 examine critically all the material of this genus found in the her- 

 barium of the Agricultural College. A number of species were 

 found which seemed to us worthy of description, and diagnoses of 

 them are included in this paper. 



Acacia constricta paucispina var. nov. 



Plant almost twice the size of the typical form of the species ; 

 spines much less numerous, usually shorter, sometimes none on 

 herbarium specimens; leaves larger with more numerous pinnae 

 and leaflets ; young parts much more pubescent and less glandular 

 and resinous. 



In the field this plant seems distinct enough from the typical 

 A, cons&icta Benth., which is a shrub about i to 1.5 m. high, 

 growing upon high gravelly mesas associated with Condalia and 

 Covillea, at an altitude of about 1200 m. The proposed variety 

 grows at considerably higher levels up to about 1700 m., in the 

 foothills of the mountains and in the mouths of canons. It usually 

 occurs as separate shrubs, widely scattered and never forming 

 thickets as the typical form does. It is not infrequently 4 m. high. 



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