JANUARY 1 TO DECEMBER 31, 195 7 201 



240699 to 240730— Continued 



240699. Acacia willardiana Rose Mimosaceae. 



Col. No. 16479. Rocky volcanic hill, Cojon del Diablo, north of Guaymas, 

 Sonora. Apr. 28, 1957. Tree small, thin, graceful; bark whitish, peeling; 

 wild ornamental. 



240700. Leucaena lanceolata S. Wats. Mimosaceae. 



Col. No. 16514. In forest, Tepopa, Sierra Saguaribo, Sonora. February 

 1957. Wild virgate shrub; stems long, straight. 



240701. Acuan sp. Mimosaceae. 



Col. No. 16561. Clay soil thicket along highway, near Bacum, Sonora. 

 May 3, 1957. Slender shrublet to 1.8 meter high; apparently wild perennial. 



240702. Arthrostylidium longifolium (Fourn.) E. G. Camus Poaceae. 



Col. No. 16537. Tepopa, Sierra Saguaribo, Sonora. February 1957. Ele- 

 vation 1,055 meters. Wild, bamboo-like canes; used locally. 



240703. Bignonia sp. Bignoniaceae. 



Col. No. 16494. In canvon, Tepopa, Sierra Saguaribo, Sonora. Februarv 

 1957. Tree wild. 



240704. Caesalpinia platyloba S. Wats. Caesalpiniaceae. 



Col. No. 16493. San Bernardo, Sonora; April 1957. Small tree or shrub; 

 single trunk; wild. 



240705. Cassia biflora L. Caesalpiniaceae. Senna. 



Col. No. 16509. In forest, San Bernardo, Sonora. March 1957. Shrub 

 wild, to 1.5 meter high; crown small, spreading. 



240706. Cenchrus myosuroides H.B.K. Poaceae. Big sandbur. 



Col. No. 16573. Rancho, Carrizal, southwest of Benjamin Hill, Chihuahua. 

 May 5, 1957. Elevation 663 meters. Arroyo margin alluvium. Tall, tough, 

 caney, wild; browsed by cattle. 



240707. Conzattia sericea Standi. Mimosaceae. 



Col. No. 16482. Tepopa, Sonora. February 1957. Tall tree; crown 

 light, thin; drought deciduous; wild. 



240708. Cornus disciflora Moc. & Sesse Cornaceae. Dogwood. 



Col. No. 16547. Oak forest zone, Tepopa, Sierra Saguaribo, Sonora. 

 February 1957. Wild, wide-spreading, ornamental tree; probably not cold 

 hardy. 



240709. Dalea grayi (Vail) L. O. Williams Fabaceae. 



Col. No. 16491. Volcanic slopes, San Bernardo, Sonora. April 1957. Wild 

 virgate perennial, about 2 meters high. 



240710. Acuan sp. Mimosaceae. 



Col. No. 16549. Along arroya, Tepopa, Sierra Saguaribo, Sonora. Feb- 

 ruary 1957. Large, wild, perennial herb; leaves large, brewed and used 

 locally for rheumatism. 



240711. Ficus radulina S. Wats. Moraceae. Fig. 



Col. No. 16507. Arroyos, San Bernardo, Sonora. February 1957. Very 

 large, wild tree; fruits sweet, edible. 



240712. Gossypium thurberi Todaro Malvaceae. Cotton. 



Col. No. 16585. Arroyo alluvium, Sierra Tesota, near Rancho Palo Alto, 

 Sonora. May 5, 1957. Slender wild plant to 2 meters high. 



240713. Haematoxylum brasiletto Karst. Caesalpiniaceae. Logwood. 



Col. No. 16490. In forest, San Bernardo, Sonora. April 1957. Small 

 stiff tree used in dye making. 



