LIST OF FLORA
153
in November and in April. This Mexican plant is known in the Rio Mayo valley
only from the valley of Curohui.
Rhynchosia
macrocarpa Benth.
Frijolin
D I S T . Foothills and barrancas, Sonora; Tepopa ( 1 4 1 6 ) , Agrimensor (3038),
Canon Estrella ( 3 9 6 ) . Type locality: Aguascalientes.
H A B . Slopes and bottom in Oak Forest. 2500-4000 feet.
Yellow-flowered vine climbing on shrubs, no. 3038 on Lippia Gentryi. Flowers
spring.
Rhynchosia
minima
(L.) DC.
D I S T . Barrancas, Sonora and Chihuahua; Bacachaca ( 1 4 5 4 ) , Guasaremos (1848,
2879).
H A B . Grassy slopes and flats in Short-tree Forest and Oak Forest. 2500-3500
feet.
A small, fine-stemmed, scandent perennial climbing on shrubs and stone fences.
Flowers yellow; summer.
Rhynchosia
nigropunctata
Wats.
D I S T . Barrancas, Sonora; Tepopa (2239).
H A B . Moist canyon slope in dense cover; Oak Forest. 3500 feet.
A clambering vine with small purple flowers; May and June. Apparently a rare
plant.
Rhynchosia
pyramidalis
( L a m . ) Urban
Chanate pusi ( M )
D I S T . Barrancas, Sonora and Chihuahua; Carimechi ( 1 1 6 8 ) , Sierra Charuco
( 1 8 2 1 ) . Recorded observations: Alamos, San Bernardo, Guasaremos.
H A B . Alluvial sandy soils in arroyo margins; Short-tree Forest. 800-2500 feet.
A vine climbing high on shrubs and trees; flowers through the fall following
the summer rains. T h e bright, lacquer-like seeds, half red and half black, ripen
through the winter, and from them the plant takes its Mayo name "pusi," eye, and
"chanate," a bird.
Rhynchosia rariflora Standi., Field Mus. Nat. Hist., Bot. Ser., vol. 1 7 , p. 264, 1937
D I S T . Barrancas, Chihuahua; Guasaremos (2883 type). Type locality: Guasa­
remos, Chihuahua.
H A B . With grasses on gentle slope of valley margin in Short-tree Forest at foot
of oaks. 3000 feet.
A small, climbing vine with yellow flowers; September. On the slopes of the
Guasaremos valley, the only observed locality, it was obscured in the rife bunch
grasses, on which it clung.
Rhynchosia sp.
D I S T . Lowlands, Sonora; San Bernardo (2278).
H A B . Arroyo margin; Short-tree Forest. 1000 feet.
Eriosema grandiflorum
(Schl. & Cham.) Seem.
Igualamilla
D I S T . Montane, Sonora and Chihuahua; Sierra L a Chuna (collected in 1 9 3 3 ) ,
Guasaremos ( 1 8 3 7 ) , Canon Estrella (434), Algodones, Cedros range (460).
Recorded observations: Mescales, Sierra Saguaribo. Type locality: Hacienda de la
Laguna, Veracruz.
H A B . Rocky hill slopes in Oak Forest. 3000-4500 feet.
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