420 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Anthocarp usually with 3 angles, sometimes 

 with 4. 

 Inflorescence of axillary or terminal simple 



umbels 19. B. pterocarpa. 



Inflorescence paniculate 20. B. triquetra. 



Anthocarp 5-angled. 



Perianth 2 to 3 mm. long. 



Leaf blades linear to lanceolate; an- 

 thocarp with thin, wing-like 



angles 21. B.maculata. 



Leaf blades lanceolate to ovate; angles 

 of the anthocarp thick, narrow, 



not wing-like 22. B. lateriflora. 



Perianth 1.5 mm. long or less. 



Leaf blades ovate (usually black- 

 dotted beneath); flowers in a 



compound corymb 23. B. crecta. 



Leaf blades lanceolate or oblong; 

 flowers in heads or simple 

 umbels. 

 Leaf blades lanceolate, black- 

 dotted beneath 24. B.universitatis. 



Leaf blades oblong, not black- 

 dotted beneath 25. B. intermedia. 



1. Boerhaavia linearifolia A. Gray, Amer. Journ. Sci. II. 15: 322. 1853. 

 Type locality, "Western Texas." 



Specimens examined: 



Coahuila: Saltillo, May, 1898, Palmer 155. 

 Coahuila or Nuevo Leon: 1880, Palmer 1121. 



2. Boerhaavia anisophylla Torr. Bot. Mex. Bound. 171. 1859. 

 Boerhaavia palmeri S. Wats. Proc. Amer. Acad. 18: 142. 1883. 



Type locality, "Entrance of the Great Canon of the Rio Grande," Texas. 

 Specimens examined: 



Coahuila: Saltillo, 1880, Palmer 1120 (type of B. palmeri); vicinity of Sal- 

 tillo, May, 1898, Palmer 156; Mesillas to Saltillo, 1848, Gregg 533; west of 

 Cerralvo, 1847, Gregg 829. 

 Nuevo Leon: Monterey, 1846, Edwards <k Eaton 61. 

 Chihuahua: Santa Eulalia Mountains, August 12, 1885, Pringle 685. 

 It should be noticed that Doctor Watson described two distinct species under the 

 name of Boerhaavia palmeri besides a B. spicata palmeri. The second species is noted 

 upon page 424 under Boerhaavia spicata. The one which is a synonym of B. aniso- 

 phylla was described first, and after it was found to be a synonym the second waa 

 described. In the original description of the first B. palmeri it is wrongly called an 

 annual . 



2a. Boerhaavia anisophylla micrantha Heimerl, Ann. ("oris. Jard. Geneve 5: 

 187. 1901. 



Type locality, "In campis ad Tehuacan," Puebla. Type collected by Galeotti 

 (no. 581). 



No material of this form has been examined. It was described as having flowers 

 much smaller than the species. From the locality in which it is found it should be 

 specifically distinct. 



3. Boerhaavia gracillima Heimerl, Bot. Jahrb. Engler 11: 86. pi. 2.f. la-lg. 1889. 



