570 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



6, ECHINOPTERYS Juss. Arch. Mus. Hist. Nat. (Paris) 3: 342. 1844 



Erect or scantlent shrubs ; leaves alternate, entire ; flowers racemose, the 

 petals dentate ; fruit 3-lobate, densely birstly. 



Leaves petiolate, mostly ovate, 1 to 3 cm. long; bristles of the fi'uit slender, 

 densely pubescent 1. E. eglandulosa. 



Leaves sessile or subsessile, linear-oblong, mostly less than 1 cm. long; bristles 

 stout, glabrate 2. E. setosa. 



1. Echinopterys eglandulosa (Juss.) Small, N. Amer. Fl. 25: 148. 1910. 

 Bunchosia eglaniUdosa Juss. Ann. Sci. Nat. II. 13: 325. 1840. 

 Echinopterys lappula Juss. Arch. Mus. Hist. Nat. (Paris) 3: 342. 1844. 

 Sonora to Zacatecas, Morelos, and Oaxaca. 



Slender scandent shrub; leaves lanceolate to broadly ovate, 1 to 3 cm. long; 

 flowers yellow, the petals 6 to 10 mm. long ; fruit densely bristly, purplish. 



2. Echinopterys setosa T. S. Brandeg. Univ. Calif. Publ. Bot. 4: 182. 1911. 

 Known only from the type locality. Sierra de la Paila, Coahuila. 



Densely branded shrub with white-strigose branchlets ; leaves linear-oblong, 

 1 cm. long or shorter. 



7. ROSANTHUS Small, N. Amer. Fl. 25: 131. 1910. 



1. Bosanthus subverticillatus (Rose) Small, N. Amer. Fl. 25: 131. 1910. 



"i Banistcria Ircvipes Moc. & Sesse; DC. Prodr. 1: 591. 1824. 



Gaudicliaudia sulverticiUata Rose, Contr. U. S. Nat. Herb. 8: 49. 1903. 



Durango and Jalisco ; type collected between Huejuquilla and Mexquitic, 

 Jalisco. 



Erect shrub, 50 to 80 cm. high, copiously pubescent ; leaves opposite or 

 ternate, oblong, 4 to 10 cm. long, obtuse and mucronate, entire ; flowers yellow, 

 the petals 7 to 11 mm. long, denticulate ; fruit of 3 samaras, these 11 to 13 mm, 

 long. 



8. GAUDICHAUDIA H. B. K. Nov. Gen. & Sp. 5: 1.56. 1822. 



Scandent or trailing shrubs ; leaves opposite, entire, petiolate ; calyx with 8 

 or 10 glands ; petals yellow, dentate ; fruit of usually 3 samaras. 



Samaras V-shaped, the wings distinct at apex. 



Anther-bearing stamens 5 1. G. karwinskiana. 



Anther-bearing stamens 3. 



Flower clusters loose ; sepal glands oval 2. G. schiedeana. 



Flower clusters dense ; sepal glands linear 3. G. conf ertiflora. 



Samaras orbicular or obovate, the wings extending all around the body. 

 Anther-bearing stamens 5. 



Sepals less than 5 mm. long ; corolla less than 2 cm. broad_4. G. pentandra. 



Sepals over 5 mm. long ; corolla more than 2 cm. broad. 5. G, arnottiana. 



Anther-bearing stamens 3. 



Leaves sessile or nearly so, narrowed to the base 6. G. cynanchoides. 



Leaves conspicuously petiolate, more or less cordate at base. 



Samaras mucronate at base 7. G. mucronata. 



Samaras long-caudate at base 8. G. webbiana. 



1. Gaudichaudia karwinskiana Juss. Ann. Sci. Nat. II. 13: 252. 1840. 



Described from Mexico, the locality not known ; specimens from Jalisco 

 may belong here. 



Leaves oblong-ovate or obovate, about 2.5 cm. long, pubescent on both sur- 

 faces. 



