WOOTON AND STANDLEY—FLORA OF NEW MEXICO. 507 
Hoods of the crown not corniculate, or very 
obscurely so. 
Leaves mostly scattered, not densely 
tomentose beneath; flowers 
greenish; anther wings nar- 
rowed below........-.---------- 4, ACERATES (p. 508). 
Leaves opposite, densely tomentose 
beneath; flowers dark purple; 
anther wings not narrowed be- 
lOW. 2.2. e eee eee eee eee ee eee 7. GompHocarRPus (p. 513). 
Hoods of the crown aristate or corniculate- 
appendaged within. 
Hoodsshort, not surpassing the stamens, 
or if long much broader below, 
never constricted at the base... 5. AsciEpras (p. 509). 
Hoods long, erect, much surpassing the 
stamens, laminately expanded 
below, narrow at the summit, 
mostly bicorniculate..........- 6. PoposTemMa (p. 512). 
1. VINCETOXICUM Walt. Anatz-pop. 
Herbaceous twining pubescent perennial from a slender rootstock; leaves opposite, 
sagittate-cordate; flowers greenish, in small clusters; sepals lance-elliptic, green; 
corolla narrowly campanulate, the lobes as long as the tube, oblong, obtuse; crown 
nearly equaling the column, entire or barely undulate, inserted at the base of the 
short column and connected with it by 5 adnate crests, free at the 2-toothed or entire 
apex; pollinia obliquely inserted on broad winged caudicles; follicles ovoid, 3 cm. 
long or more, puberulent. 
1. Vincetoxicum productum (Torr.) Vail, Bull. Torrey Club 26: 431. 1899. 
Gonolobus productus Torr. U. 8. & Mex. Bound. Bot. 165. 1859. 
Tyre Locauity: ‘Banks of Rock Creek,’’ ‘‘Valley of the Limpio, and along the 
Rio Grande,’’ Texas. 
Rance: Western Texas to southern Arizona and southward. 
New Mexico: Organ Mountains; Mesilla Valley; Gray. Moist ground, in the 
Lower and Upper Sonoran zones. 
2. PHILIBERTELLA Vail. 
Herbaceous twining perennials with opposite leaves and mostly fragrant flowers in 
axillary umbels; calyx small, 5-lobed, the lobes acute; corolla campanulate or rotate, 
a shallow entire or undulate ring forming an outer crown in its throat, the lobes 5, 
longer than the tube, the inner crown of 5 turgid, fleshy or hard scales or flattish 
appendages attached in a circle at the base of the sessile or slightly stalked column, 
forming a hollow, entire or undulate, spreading surface near the level of the conical 
stigmas; follicles naked, slender. 
KEY TO THE SPECIES. 
Column conspicuous; peduncles much shorter than the crispate 
leaves; stems Cinereous. . . 2.2.2... 0c e eee eee eee eee 1. P. crispa, 
Column inconspicuous or none; peduncles equaling or surpassing 
the leaves, these not crispate; stems glabrous or pubescent. 
Stems pubescent; flowers numerous in each umbel, white; 
leaves cordate-ovate to subsagittate.............-.-.- 2. P. cynanchoides. 
Stems glabrous or nearly so; flowers few, reddish; leaves 
linear... 2.22.2. 2 eee eee ee eee ee ee eee eee eee 3. P. heterophylla. 
