FLOWERING PLANTS AND FERNS OF ARIZONA 745 



1. Pectocarya setosa A. Gray, Amer. Acad. Arts and Sci. Proc. 12: 81. 



1876. 



Pectocarya setosa var. holoptera Johnston, Gray Herbarium 

 Contrib. 70: 39. 1924. 



Mohave, Yavapai, Gila, Maricopa, and Pinal Counties, 2,000 to 

 5.000 feet, apparently not common. Idaho and Washington to cen- 

 tral Arizona and California. 



2. Pectocarya heterocarpa Johnston, Arnold Arboretum Jour. 20: 399. 



1939. 



Pectocarya penicillata (Hook. andArn.) A. DC. var. heterocarpa 

 Johnston, Gray Herbarium Contrib. 70: 37. 1924. 



Mohave County, and southward and southeastward across Arizona, 

 3,000 feet or lower. Southwestern Utah, Arizona, southeastern 

 California, and northern Sonora. 



3. Pectocarya platycarpa Munz and Johnston, Gray Herbarium 



Contrib. 81: 81. 1926. 



Pectocarya gracilis Johnston var. platycarpa Munz and John- 

 ston, Gray Herbarium Contrib. 70: 36. 1924. 



Mohave and northern Yuma Counties, southeastward to Cochise 

 and Pima Counties, up to 5,000 feet but mostly lower, type from 

 Camp Lowell, Pima County (Pringle in 1884). Southern Utah, 

 Arizona, southeastern California, and northern Sonora. 



4. Pectocarya recurvata Johnston, Arnold Arboretum Contrib. 3: 97. 



1932. 



Mohave County southeast to Cochise and Pima Counties, up to 

 5,000 feet but mostly lower, type from near Chandler, Maricopa 

 County (Harrison and Kearney 6507). Southwestern Utah, Arizona, 

 southeastern California, and northern Sonora. 



This and the preceding species have not been seen from Yuma 

 County although several collections of P. heterocarpa are at hand from 

 that area. Elsewhere in Arizona these 3 species are frequently 

 found growing together. 



5. LAPPULA. Stickseed 22 



Small annuals with blue or white flowers in bract ed racemes; 

 nutlets 4, erect, attached to a slender elongate gynobase along the 

 length of the well-developed ventral keel; plants of dry open situations. 



Key to the species 



1. Margin of 2 or more of the nutlets obese, completely inflated, bearing a row of 

 very short, terete, barbed appendages seated upon its usually rounded edge. 



1. L. TEXA.XA. 



1. Margin of the nutlets consisting of a row of distinct barbed appendage-, or 

 the margin more or less cup-shaped through the obvious partial union of 

 the appendages, the free upper portion of the appendages sometimes 

 inflated, but always appearing as lobes of the margin and not as though 

 merely seated upon it (2). 

 2. Nutlets with 2 rows of distinct marginal appendages, the principal row on 

 the rim of the nutlet and the secondary row just outside the rim; corollas 



usually larger than in the next species 2. L. echinata. 



2. Nutlets with a single row of distinct or partly united appendages on the 

 rim, with no secondary appendages outside 3. L. redowskii. 



i2 Reference: Johnston, I. M. studies in the boraginaceae. ii. lappula. Grav Herbarium Con- 

 trib. 70: 47-51. 1924. 



