120 NORTH AMERICAN FLORA [Volume 25 



petals blue, 4.5-6.5 mm. long, with suborbicular blades erose-denticulate near the base ; 

 samaras orbicular-obcordate, 9-11 mm. wide, the lateral wings undulate or cristate, the 

 dorsal wing keel-like. 



Type locality: Near Gonai'ves, Haiti. 

 Distribution : Haiti. 



6. Mascagnia Brittonii Small, sp. nov. 



Leaf-blades lanceolate to oblong, 1-3 cm. long, acute or obtuse, or sometimes notched 

 at the apex, thick, shining, especially above, glabrous, reticulate, short-petioled ; flower- 

 stalks very slender, pliable ; sepals oblong-ovate, 2.5-3 mm. long, ciliolate, the glandsabout 

 one half the length of the sepal-body ; petals lilac, 4-5 mm. long, with ovate, erose-undu- 

 late blades ; samaras reniform, 14-18 mm. wide, the lateral wings entire, the dorsal wing 

 prominent. 



Type collected on a coral rock bench at Guantanarao Bay, Oriente, Cuba, March, 1909, A r . L. 

 Britton 1900 (herb. N. Y. Bot. Gard.). 



Distribution : About Guantanamo Bay, Cuba. 



7. Mascagnia Gouania Small, sp. nov. 



Leaf-blades ovate to orbicular-ovate, mostly 4-7 cm. long, markedly acuminate, glabrous 

 or nearly so, at least at maturity, slightly paler-green beneath than above, truncate or 

 cordate at the base, rather long-petioled ; sepals ovate or oval-ovate, 3-3.5 mm. long, gla- 

 brous, or with few scattered hairs on the back and sparingly ciliolate, the glands full}' one 

 half the length of the sepal-body ; petals purplish, 5-6.5 mm. long, with undulate blades 

 which are sometimes slightly erose near the base ; samaras suborbicular, 2.5-3 cm. wide, 

 undulate and sometimes cordate at the base, the dorsal wing reduced to a mere ridge or 

 keel. 



Type collected near Jojutla, Morelos, Mexico, October 18, 1902, C. G. Pringle 9701 (herb. N. Y. 

 Bot. Gard.). 



Distribution : Morelos. 



8. Mascagnia polybotrya (A. Juss.) Niedzu. in E. & P. Nat. 

 Pfl. 3 4 : 56. 1890. 



Hiraea polvbotrya A. Juss. Ann. Sci. Nat. II. 13 : 260. 1840. 

 ? Hiraea spicigera Turcz. Bull. Soc. Nat. Mosc. 36' : 584. 1863. 



Leaf-blades ovate, mostly 2.5-5 cm. long, abruptly short-acuminate, softly pubescent 



on both sides, rounded or subcordate at the base, short-petioled ; sepals ovate, the glands 



nearly as long as the sepal-body ; petals ' ' blue, ' ' the blades denticulate ; samaras about 1.5 



cm. in diameter, the dorsal wing crest-like. 



Type locality : Mexico. 

 Distribution : Mexico. 



9. Mascagnia ovatifolia (H.B.K.) Griseb. Fl. Brit. 

 W. Ind. 121. 1859. 



Hiraea ovatifolia H.B.K. Nov. Gen. & Sp. S : 170. 1822. 



Leaf-blades ovate, ovate-lanceolate, or lanceolate, 6-12 cm. long, acuminate, pubescent 



on both sides, at least when young, usually permanently so beneath, bright-green above, 



paler beneath, rounded or subcordate at the base, short-petioled ; sepals oblong-ovate, 2.5-3 



mm. long, the glands nearly as long as the sepal-body; petals "rose-colored," "lilac," 



" violet," or " yellow," 4-5 mm. long, the blades denticulate; samaras suborbicular, 2.5-3 



cm. in diameter, erose-undulate, usually cordate at the base, the dorsal wing keel-like. 



Type locality : Cuinana, Venezuela. 



Distribution : Salvador, Panama, and northern South America. 



10. Mascagnia cana Small. 



Hiraea sericea Engelm.; A. Gray, PI. Wright. 1 : 37. 1852. Not H. sericea A. Juss. 1832. 

 Mascagnia sericea Niedzu. Gen. Masc. 29. 1908. 



Leaf-blades linear-oblong to ovate, 1 cm. long or less, acute or mucronate, revolute, 

 sericeous above, lanate beneath, obtuse or subcordate at the base, very short-petioled or ses- 



