418 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Leaves not long-attenuate. 



Stems hirtellous throughout, the leaf blades 



puberulent on both surfaces, thick and 



fleshy 3a. A. longijlora hirtella. 



Stems glabrous; leaf blades glabrous and much 



thinner A, A, greggii. 



1. Acleisanthes acutifolia Standley, Contr. Nat. Herb. 12: 370. 1909. 

 Type locality, "Maxon's Spring, Texas." Type collected by Dr. V. Havard. 



Specimens examined: 



Chihuahua: Santa Eulalia Mountains, August 25, 1885, Pringle 671. 

 Coahuila: Saltillo, June, 1898, Palmer 282. 



2. Acleisanthes anisophylla A. Gray, Amer. Journ. Sci. II. 15: 261. 1853. 



Type locality, "Prairies of Turkey Creek and Elm Creek, Western Texas." Type 

 collected by Charles Wright (no. 598). 



No Mexican specimens of this species have been examined by the writer, but 

 Hemsley states that it was coIWled in northern Mexico along the Rio Grande by 

 Schott. 



3. Acleisanthes long-iflora A. Gray, Amer. Journ. Sci. II. 15: 261. 1893. 

 Typelocality, "Valley of the Limpio," Texas. The type is Charles Wright's no. 599. 



Specimens examined: 



Chihuahua: Vicinity of Aldama, May, 1908, Palmer 243; near Chihuahua, 1885, 



Pringle 101. 

 Coahuila: Vicinity of Saltillo, May, 1898, Palmer 181; Parras, 1905, Purpm 



1056; Saltillo, 1848, Gregg 88; Buena Vista, 1847, Gregg 355. 

 Coahuila or Nuevo Le6n: 1880, Palmer 1116. 

 The root of this plant is reported to have useful medicinal properties. It is known 

 under the names of trompetilla and yerba de la rabia. 



3a. Acleisanthes longiflora hirtella Standley, Contr. Nat. Herb. 12: 371. 1909. 

 Type locality, "Near Saltillo, Coahuila." Type collected by Gregg, September 20, 



1848 {no. 463). 

 Only the type specimen has been examined. 



4. Acleisanthes greg-gii Standley, Contr. Nat. Herb. 12: 371. 1909. 



Type locality, "Monterey, Mexico." Type collected by Gregg, June 22, 1848 

 (no. 157). 



19. BOEBHAAVIA L. 



Boerhaavia L. Sp. PI. 3. 1753. 

 Type species, Boerhaavia erecta L. 



KEY TO THE SPECIES. 



Perennials. 



Flowers not in umbels; or heads. 



Leaves linear or linear-lanceolate 1. B. linearifolia. 



Leaves ovate or oblong. 



Flowers clustered, sessile or on very short pedicels; 



fruit glabrous 2. B. anisophylla. 



Flowers soliUiry on pedicels 10 mm long or more; 



fruit viscid 3. B. gracillima. 



Flowers in umbels or heads. 



Stems glandular throughout; clusters of flowers and 



fruit 6 to 10 mm. in diameter 4. B, viscosa. 



