134 NORTH AMERICAN FLORA [Volume 25 



10. BANISTERIA L,. Sp. PI. 427. 1753. 



Heteropteris H.B.K. Nov. Gen. & Sp. 5 : 163. 1822. 



Shrubs, trees, or woody vines. Leaves opposite ; blades thick-membranous or leathery, 

 often pubescent, commonly reticulate or rugose, entire or nearly so. Flowers borne in 

 panicled, often leafy-bracted cymes. Calyx with 8 glands or glandless ; sepals 5, broad or 

 narrow, often recurved at the tip, persistent. Corolla yellow, orange, or purple ; petals 5, 

 the blades narrow or broad, entire, undulate, or erose-denticulate. Stamens 10, all anther- 

 bearing ; filaments subulate ; anthers very thick. Ovary 3-lobed. Styles 3, distinct, some- 

 what unequal. Samaras 2 or 3 together, or solitary, the wing conspicuous, thickened 

 along the dorsal side, the body unappendaged or crowned. 



Type species, Banisteria brachiata L. 

 Sepals with erect tips. 



Samara-body with lateral appendages. 



Leaves with 2-6 sessile glands near the base of the blade. 1. B. Beecheyana. 



Leaves with 2 stipitate glands near the base of the blade. 



Glands borne on the lower surface of the leaf-blade between the 

 margin and the midrib. 

 Samara-body crowned ; leaf-blades obtuse or emarginate. 2. B. cotinifolia. 



Samara-body erownless ; leaf-blades acute or slightly acuminate. 3. B. arborescens. 

 Glands borne on the margin of the leaf-blade near the base. 



Samara-bodies with wing-like lateral appendages. 4. B. Gayana. 



Samara-bodies with tuberculate or cristate lateral appendages. 



Sepals ovate ; larger petals 6 mm. long or less. 5. B. Pahneri. 



Sepals oblong ; larger petals 8 mm. long or more. 



Samara-wing auricled at the base ; leaf -blades glabrous or 



nearly so and glaucous beneath. 6. B. Portillana. 



Samara-wing not auricled at the base ; leaf -blades copi- 

 ously pubescent beneath. 7. B. simulans. 

 Samara-body unappendaged, sometimes veiny. 

 Corolla blue, purple or crimson. 



Petal-blades not sagittate at the base ; filaments 4-5 mm. long. 8. B. retusa. 



Petal-blades sagittate at the base ; filaments 2-2.5 mm. long. 9. B. purpurea. 



Corolla yellow. 



Leaf -blades not reticulate above. 



Glands nearly as long as the sepal-body, conspicuous. 10. B. apiculata. 



Glands about one half as long as the sepal-body, inconspicuous. 



Sepals oblong, the glands oblong. 11. B. obovata. 



Sepals ovate, the glands oval. 12. B. Kuntzei. 



Leaf-blades reticulate above. 13. B. Wydlerana. 



Sepals with recurved tips. 



Samara-wings constricted above the body, relatively narrow. 



Calyx glandless ; petals very slender-clawed. 14. B. suberosa. 



Calyx gland-bearing ; petals stout-clawed. 15. B. laurifoha. 



Samara-wings not constricted above the body, very broad. 



Samara-wing several times longer than the body. 16. B. longifolia. 



Samara-wing slightly longer than the body. 17. B. reticulata. 



1. Banisteria Beecheyana (A. Juss.) C. B. Robinson. 



Banisteria tomentosa Schlecht. Linnaea 10 : 244. 1833. Not B. tomentosa Desf . 1804. 

 Heteropteris tomentosa H. & A. Bot. Beech. Voy. 281. 1836. 

 Heteropteris Beecheyana A. Juss. Ann. Sci. Nat. II. 13 : 278. 1840. 

 Heteropteris Beecheyana typica Niedzu. Gen. Heteropt. 4. 1903. 

 Heteropteris Beecheyana guatcmalensis Niedzu. Gen. Heteropt. 5. 1903. 



Leaf -blades oblong or oval, varying to ovate or obovate, mostly 2.5-7 cm. long, acute 



or mucronate, impressed-veined and more or less pubescent above at least when young, 



prominently veined and tomentose beneath, obtuse or subcordate at the base, short-petioled ; 



inflorescence pyramidal during anthesis ; sepals oblong to oblong-ovate, 2.5-3 mm. long, 



the glands about one half the length of the sepal-body; larger petals 4.5-6 mm. long; 



samaras 3^1 cm. long, the wing tomentulose, slightly dilated near the apex, the body with 



a single crown. 



Type locality: Mexico. 



Distribution : Mexico and Central America ; also in Colombia. 



2. Banisteria cotinifolia (A. Juss.) C. B. Robinson. 



Heteropteris cotinifolia A. Juss. Ann. Sci. Nat. II. 13 : 274. 1840. 



Leaf-blades broadly ovate to suborbicular, mostly 4-7 cm. long, obtuse or emarginate 

 and apiculate at the apex, puberulent on both sides when young, smooth above, promi- 



