WOOTON AND STANDLEY—FLORA OF NEW MEXICO. 515 
1. Cuscuta squamata Engelm. Trans. Acad. St. Louis. 1: 510. 1859. 
Tyre Loca.ity: ‘El Paso.’’ 
Rance: Western Texas and southern New Mexico and southward. 
New Mexico: Mesilla Valley; south of Roswell. Lower Sonoran Zone. 
Common on Helianthus ciliaris and other plants of the valleys. 
2. Cuscuta umbellata H. B. K. Nov. Gen. & Sp. 3: 121. 1818. 
TYPE LocaLity: ‘‘Crescit in Nova Hispania, inter Querétaro et Salmanca, alt. 
900 hex.’’ 
Rance: Colorado and Texas to Arizona and Mexico. 
New Mexico: Santa Fe; Pajarito Park; Clayton; Torrevios; Hillsboro; Tortugas 
Mountain; Chavez; Duck Creek Flats. Lower and Upper Sonoran zones. 
On many small herbs, such as Trianthema portulacastrum, Kallstroemia brachystylis, 
Cladothrix lanuginosa, Chamaesyce spp., Eriogonum rotundifolium, Bahia dealbata, 
Wedeliella glabra, Boerhaavia torreyana, Cassia bauhinioides, Chamaesaracha conioides, 
and many others; also on cultivated beets. 
3. Cuscuta curta Engelm.; Rydb. Colo. Agr. Exp. Sta. Bull. 100: 273. 1906. 
Cuscuta gronovii curta Engelm. Trans. Acad. St. Louis 1: 508. 1859. 
Type Locauity: ‘‘ Northwest America.”’ 
Rance: Utah and Colorado to Arizona and New Mexico. 
New Mexico: Shiprock; Farmington; Albuquerque; Santa Fe; Sandia Moun- 
tains; Nara Visa; Ojo Caliente; Chiz; Mogollon Mountains; Kingston; Mesilla Valley; 
La Luz; White Mountains. Chiefly in the Upper Sonoran and Transition zones. 
On various plants, such as Gaertneria acanthicarpa, Peritoma serrulatum, Salix, 
Salsola pestifer, Xanthium commune, Helianthus annuus, Rumex mexicanus, and 
Aster hesperius, and on cultivated plants such as beets and chile. 
4. Cuscuta epithymum L. Sp. Pl. 124. 1753. CLOVER DODDER. 
Type Loca.ity: ‘Habitat in Plantis Europae parasitica.”’ 
New Mexico: Cedar Hill (Standley 8058). 
On alfalfa; introduced from Europe. 
118. CONVOLVULACEAE. Morning-glory Family. 
Annual or perennial herbs, often twining; leaves alternate, exstipulate; flowers 
perfect and regular, axillary, solitary or cymose; calyx of 5 more or less united 
imbricated sepals, persistent; corolla hypogynous, convolute in bud, the limb often 
entire; stamens 5, alternate with the divisions of the corolla, often epipetalous; 
pistil of 2 more or less united carpels, the ovary 2 to 5-celled, on a fleshy disk; styles 
often united; fruit a capsule, 1 to 5-celled, the seeds large; endosperm mucilaginous. 
KEY TO THE GENERA. 
Styles distinct or at least partly so; decumbent or as- 
cending herbs, not twining or trailing. 
Styles partially united, entire; limb of corolla 
deeply 5-lobed, the lobes ovate-lanceolate... 1. Cressa (p. 516). 
Styles distinct, each 2-cleft; corolla limb not lobed. 2. Evotvu.us (p. 516), 
Styles united up to the stigma; climbing or trailing 
vines (except Ipomoea leptophylia). 
Corolla narrowly funnelform, nearly salverform, 
bright scarlet; stamens and style exserted.... 3. QuamocuiT (p. 517). 
Corolla broadly funnelform, never scarlet; stamens 
_and style included. . 
Stigmas 1 to 3, ovoid or subglobose..........-- 4. IpomoEa (p. 517). 
Stigmas usually 2, filiform to oblong-cylindric.. 5. CovoLvu.us (p. 519). 
