WOOTON AND STANDLEY FLORA OF NEW MEXICO. 407 



There is room for considerable doubt concerning the validity of the numerous seg- 

 regates of this group recently proposed. The differences between the species are 

 mostly variations in leaf outline. Upon a single shrub one finds great variation in 

 this respect, so that it is questionable whether it is wise to maintain more than a 

 single species of the group, S. trilobate. There is some variation in pubescence, but 

 this is only in quantity. Doctor Greene speaks of certain glabrous plants, but we 

 have been unable to find any that are truly glabrous. Field study is necessary to 

 determine with any degree of precision the exact relationship between the numerous 

 forms. 



1. Schmaltzia affinis Greene, Leaflets 1: 135. 1905. 



Type locality: "Shrub of southern Utah deserts, collected at Kanab, Springdale, 

 and Silver Reef." 



Range: Southern Utah to northern Arizona and northwestern New Mexico. 



New Mexico: Carrizo Mountains (Standley 7338). Dry hills among rocks, in the 

 Upper Sonoran Zone. 



This is probably an extreme variant of S. trilobate, influenced largely by the very 

 arid situations in which it grows. The leaves are commonly unifoliolate, but some- 

 times they are cleft nearly to the base, and frequently the plants bear a few trifo- 

 liolate leaves. 



2. Schmaltzia emoryi Greene, Leaflets 1: 133. 1905. 



Rhus trilobate mollis A. Gray; Patterson, Check List 21. 1892. 



Rhus emoryi Wooton; Greene, op. cit. 134, as synonym. 



Type locality: "Hills and low mountains of eastern and southern New Mexico." 

 Type collected by Wooton (no. 584). 



Range: Southern New Mexico and Arizona. 



New Mexico: Horse Camp; Mangas Springs; Burro Mountains; Dog Spring; moun- 

 tains west of San Antonio; Organ Mountains; Mesilla Park; White Sands; Roswell; 

 Perico; Queen; south of Torrance. Dry hills and valleys, in the Lower and Upper 

 Sonoran zones. 



3. Schmaltzia pulchella Greene, Leaflets 1: 134. 1905. 

 Type locality: "Toward the Rio Limpio, western Texas. 

 Range: Western Texas and southeastern New Mexico. 



New Mexico: Queen (Wooton). Dry hills, in the Upper Sonoran Zone. 



4. Schmaltzia leiocarpa Greene, Leaflets 1: 133. 1905. 



Tvi-e locality: Valley of the Rio Grande at Mesilla, Now Mexico. Type collected 

 by Wooton (no. 48). 



Range: Southern New Mexico and southeastern Arizona. 



New Mexico: Reserve; Black Range; San Luis Mountains; Mesilla; Dona Ana 

 Mountains; above Tularosa; Cloudcroft; Lincoln National Forest. Mesas and river 

 valleys, in the Lower Sonoran Zone. 



5. Schmaltzia cognata Greene, Leallets 1: 111. 1905. 

 Type loi uuty: Durango, Colorado. 



Range: Southern Colorado and northwestern New Mexico. 



New Mexico: Tunitcha Mountains; Cedar Hill. Dry hills, in the Upper Sonoran 



Zone. 



6. Schmaltzia quercifolia ( In, me, Leaflets I: 111. 1905 



Type locality: Canyons in Seward Count] outhwi tern Kansas 



Ranqi Causae to northeastern New Mexico 



New Mexico Glorieta; Folaom; Nan Vi < Raton I o . hills and open plai 



in the I pp< r Sonoran Zone. 



