WOOTON AND STANDLEY FLORA OF NEW MEXICO. 291 



1. Wislizenia refracta Engelm. in Wisliz. Mem. North. Mex. 99. 1848. 



Type locality: "On the upper crossing of the Rio Grande, near El Paso," Texas. 



Range: Western Texas and southern New Mexico. 



New Mexico: Mesilla Valley. Dry fields, in the Lower Sonoran Zone. 



Occurs rather abundantly in the Rio Grande Valley in the extreme southern part 

 of the State. It is readily recognized by the veiy small, 2-seeded, 2-valved fruit, 

 each valve of which is indurated and reticulated, and closely invests the seed. 



57a. RESEDACEAE. Mignonette Family. 



1. DIPETALIA Raf. 



Low branching herb, somewhat succulent, with numerous linear entire leaves; 

 flowers small and inconspicuous, in terminal spikes; sepals 4; petals 2, entire or lobed; 

 stamens 3 to 8; pod 4-beaked, about 3 mm. in diameter, opening at the summit. 



1. Dipetalia subulata (Webb & Berth.) Kuntze, Rev. Gen. PL 1: 39. 1891. 



Resedcll'i subulata Webb & Berth. Hist. Nat. Canar. 1: 107. 1836. 



Type locality: " Circa Portum Caprarum in insula Fuerteventura, et in Lancerotta 

 circa oppidum Arecife." 



Range: Southern California to western Texas, southward into Mexico; also in 

 Asia and Africa. 



New Mexico: Near La Luz; Range Reserve, Dona Ana County. Alkaline soil. 



Order 27. ROSALES. 



KEY TO THE FAMILIES. 

 Flowers irregular. 



Fruit indehiscent, armed with spines; leaf 



blades simple; stipules wanting 69. KRAMERIACEAE (p. 336). 



Fruit a legume or loment; leaf blades com- 

 pound; stipules usually present. 

 Upper petals inclosed by the lateral ones 



in the bud 68. CASSIACEAE (p. 332). 



Upper petal inclosing the lateral ones 



in the bud 70. FABACEAE (p. 336). 



Flowers regular or nearly so. 



Endosperm want ing or scant. 



Flowers monoecious, in dense clusters.. 63. PLATANACEAE (p. 304). 



Flowers perfect or if not perfect not in 



capitate clusters. 



Carpels several or numerous or if 



solitary becoming an achene. 



Carpels distinct, free? from the 



hypanthium; fruit of 



achenes, follicles, or 



drupelets 64. ROSACEAE (p. 



Carpels united, inclosed by and 

 adnate to the hypan- 

 thium; fruit a pome 65. MALACEAE (p. 321). 



Carpels solitary, not becoming 

 achenes. 

 I )\ary 2-ovuled; bruit a drupe; 



leaves simple 66. amygdalaceae (p. 324). 



Ovary several-ovuled; fruit a 



legume; leavee pinnate. .67. mimosaceae (p. 327). 



