190 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 13 



Oaxaca. 



Not previously known from Jalisco, the collection of this shrub 

 marks a northern extension of range. Like many other spring blooming 

 shrubs of the semiarid tropical Pacific tierra caliente, it is nearly leafless 

 at flowering time, as faithfully reflected by Elmore's specimens. 



TOURXEFORTIA HIRSUTISSIMA L., Sp. PL 140. 1753. 



Tenacatita Bay, Jalisco, i\Iay 8, Elmore h45, in dry open forest at 

 15 feet elevation, flowers white. 



Widely distributed in tropical and subtropical America, from Sinaloa 

 to South America and the West Indies. 



Verbexaceae 



AviCEXxiA XITIDA Jacq., Enum. PL Carib. 25. 1760. 



Chacagua Bay, Oaxaca, March 21, Ebnore D21a. 



Littoral from Baja California and Tamaulipas south through tropi- 

 cal America. 



Laxtaxa horrida HBK., Nov. Gen. & Sp. 2:261. 1817. 



Chacagua Baj^, Oaxaca, March 21, Elmore D13, a few plants in dry 

 sandy soil climbing on Couepia polyandra, flowers red and yellow. 



Widely distributed in the warmer parts of America; from southern 

 Sonora south along the ^Mexican west coast. 



Phylla xodiflora (L.) Greene, Pittonia 4:48. 1899. 



Chacagua Bay, Oaxaca, March 21, Elmore D3y dry sandy soil near 

 sea level. 



Widely distributed in the tropical lowlands of both hemispheres. 



This is a common strand plant along the beaches and bottomlands 

 of western ]\Iexico. On the sand dunes it forms only sparse covering of 

 loosely branched, prostrate, dispersed plants, while on the moister clay 

 soils back of the beach dunes and inland it may form a compact turf- 

 like covering. 



SOLAXACEAE 



SoLAXUM DivERSiFOLiuM Schlecht., Linnaea 19:297. 1846. 



Tenacatita Bay, Jalisco, May 8, Elmore 1A9, a few shrubs with 

 white flowers growing in dry open exposed clay soil. 



Apparently along both [Mexican coasts from Baja California, Sina- 

 loa, and Tamaulipas south to Central America. 



SoLAXUM xuDUM HBK., Nov. Gen. k Sp. 3:33. 1818. 

 Chacagua Bay, Oaxaca, March 21, Elmore D17, many plants, 



