15G CONTRIBUTIONS TO WESTERN BOTANY NO. li 



opposite 



ped 



les 2-4 inches long, generally with 1-3 short and leaflike bracts,, then 

 with Oi series of oblong and raflier scarious bracts with greenish tips, then 

 others more scarious and incllined to be lacerate at tip. Outer akenes 

 inclined to be flattish and with two wings, the other two angles acute but 

 not winged, the face very warty. Inner akenes 4-winged and 4-angled 

 and less warty, all about 3 mm. long and elliptical-obovate, without 

 pappus. Rays yellow, oval, 2-3 mm. longer than tiie bracts, heads about 

 half an inch high and hemispherical. No. 23394 Acaponeta Nayrit, near 

 the El Tigre mine, March 1, 1927. 



Cacalia Tepicana N. Sp. No. 23."5S7, Tepic Nayarit, February 10, 

 1^27. Strict herbs 4-6 feet high, ereoc and simple stemmed, leafy, pur- 

 ple stemmed and angulate as are Ac petioles, deciduously somewhat 

 jHibescent on younger parts, but lea^^ smooth and shining but lighter 

 colored below, veiny. General outline if leaves is nearly round and 3-4 

 inchei* long, shallowly angulate-dentfitt with 6-8 teeth which are much 

 wider than Jiigh, and with few rudimgfitary teeth on the margins. Midrib 

 ^f leaves dissipates quickly into 4-5 pairs of stout veins near its base, and 

 t;icse veins branch on the outer side into one or two others, and sinking 

 into veinlets at the tip. The tip of the stems dissipates into small and 

 Jong-peduncled panicles in the axils of the upper leaves, which are some- 

 what reduced, the whde plant ending in a rather large panicle. Heads 

 aboat 5 mm. long, of about a dozen flowers, wifli very white pappus, the 

 scales at length widely spreading, linear and obtusish. Growing on 

 gravelly and prairie-like slopes. 



Melampodium hispidum H. B. K. This is seemingly closely related 

 to Hcmiszonella Durandi, but plants without glands or glutinous pubes- 

 cence. Leaves and bracts ciliate with stiff and white hairs, and surface 

 of leaves with scattered hairs. Bracts thin and oval, about 3 mm. long, 

 barely a'S long as the akenes, which are obliquely oblong-obovate, much 

 fattened, truncate in cross-section on the back and wit^hout warts, with 

 sides with scattered and sharp warts but no glands. Tip depressed- 

 truncate. Corollas yellow, much recurved and setose-hairy below, less 

 ikaiji r mm. long, pappus none. Otherwise as in H. Durandi. Plants 

 6-12 inches high, erect, growing in waste places. Nogales, Arizona, 

 Ctettober 23, 1926, No. 2268L 



It is evident to me that Hemizonella of Gray is a part of the genus 

 Melampoliiim, 



Melampodium Durandi is Hemizonella Durandi Gray* 



Melampodium minimum is Hemizonella minima Gray. 



Both the above a5>ecies are closely allied to Melampodium hispidum 

 S. B* K., 



Shrubs and Trees of Mexico by Standley. This is a voluminous 

 annotated" list of Mexican aboreous plants, but caimot be called a shrub 

 and tree flora for the descriptions are inadequate. It shows great haste 

 in: compilation, and a very cursory study of tiie specfes given, and yet is 

 xeryi helpful in .many, way^. Whear we- coms-s to- ai thorough examination 



