1907] Hall. Compositae of Southern California. 271 



114. GLYPTOPLEURA Eaton. 



Tufted desert annuals with leaves much exceeding the inter- 

 nodes and surrounding the numerous short-peduncled heads. 

 Involucre of 7 to 12 equal linear-lanceolate bracts and some loose 

 foliaceous ones at base. Receptacle naked. Achenes oblong, 

 straight or incurved, obtusely 5-angled, each of the intervals 

 marked by two rows of large tubercles, abruptly contracted above 

 t<. a short stout 5-nerved beak, the base of which is surrounded 

 by a narrow cup-like border: pappus-bristles bright white, in 

 several series, the outer falling separately. 



Ligules short, little exserted 1. G. marginata. 



Ligules 10 to 15 mm. long, much exserted 2. G. setulosa. 



1. G. marginata Eaton, Bot. King Exped. 207, t. 20 (1871). 

 Stem branching from the base, the whole plant not over 5 cm. 



high excluding the long straight taproot : leaves obovate to spat- 

 ulate-linear, commonly 3 or 4 cm. long, sinuately lobed, the mar- 

 gin with a narrow scarious minutely toothed fringe; the upper 

 bract-like leaves linear-lanceolate, commonly dilated at tip, the 

 margins pectinate: involucre 10 or 12 mm. high: ligules white, 

 turning pink, scarcely exserted. 



Lower Sonoran Zone : Mohave Desert, Parish, no. 1412 ; north 

 to Oregon, Cusick, no. 2589 ; and S.E. Utah, Miss Eastwood. 



2. G. setulosa Gray, Proc. Am. Acad. ix. 211 (1874). 

 Similar to G. marginata but the scarious margin of the leaves 



less conspicuous and often broken up into longer acicular white 

 teeth ; the upper bract-like leaves commonly linear and bearing 

 teeth only at their dilated tips : ligules conspicuosly exserted, 10 

 to 15 mm. long, white or yellow, sometimes changing to pink. 



Mohave Desert (Lancaster, Barstow, Ludlow, Rabbit Springs. 

 Hinckley) to S. Utah. Perhaps not distinct from G. marginata. 

 Two specimens in the Parish Herbarium have been named by Dr. 

 Gray as G. setulosa and G. marginata (Parish, nos. 1263. 1412, 

 respectively) but they are exactly alike except that one has elon- 

 gated yellow ligules, the other inconspicuous ligules. The color, 

 however, is not a reliable character, elongated pure-white ligules 

 sometimes changing to yellow in drying, as in Hall & Chandler's 



