WOOTON AND STANDLEY—FLORA OF NEW MEXICO. 991 
1. Wislizenia refracta Engelm. in Wisliz. Mem. North. Mex. 99. 1848. 
Type tocauity: ‘On the upper crossing of the Rio Grande, near El Paso,’’ Texas. 
Rance: 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 very 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. 
Resedella subulata Webb & Berth. Hist. Nat. Canar. 1: 107. 1836. 
Type Locaity: “Circa Portum Caprarum in insula Fuerteventura, et in Lancerotta 
circa oppidum Arecife.”’ 
Rance: 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 indebiscent, 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.........2--220222200- 70. FABACEAE (p. 336). 
Flowers regular or nearly so, 
Endosperm wanting or scant. 
Flowers moncecious, 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. 305). 
Carpels united, inclosed by and 
adnate to the hypan- 
thium; fruit a pome..... 65. MALACEAE (p. 321). 
Carpels solitary, not becoming 
achenes. 
Ovary 2-ovuled; fruit a drupe; 
leaves simple...........66. AMYGDALACEAE (p. 324). 
Ovary several-ovuled; fruit a 
legume; leaves pinnate. .67. MIMOSACEAE (p. 327). 
