Part 2, 1910] MALPIGHIACEAE 119 



base, short-petioled, the petiolar glands small, borne at the base of the blade, or obsolete; 

 sepals oval, ovate or oblong-ovate, 3-4 mm. long, the glands one half as long as the sepal- 

 body or less ; petals yellow, rather similar in shape but variable in size, 6.5-12 mm. long, 

 the blades obovate, suborbicular, or ovate, erose-denticulate, not auricled at the base ; 

 samaras 4.5-5.5 cm. wide, the lateral wings flabellate, sparingly pubescent, undulate and 

 often coarsely erose. 



Type locality : Near Monterey, Nuevo Leon. 



Distribution : Mexico. 



Illustration : Contr. U. S. Nat. Herb. 1 : pi. 30. 



2. Mascagnia mexicana Niedzu. Gen. Masc. 29. 1908. 



Branches smooth ; leaf-blades ovate, 10 cm. long or less, somewhat acuminate but 



btuse, persistently pubescent beneath, obtuse or rounded at the base, short-petioled ; 



epals suborbicular, the glands nearly as long as the sepal-body ; petals yellow, the larger 



ones 10-12 mm. long, the blades suborbicular, lacerate-denticulate ; samaras 3.5-4.5 cm. 



wide, the lateral wings cuneate-flabellate, finely pubescent, erose-undulate. 



Type locality : Borrego, near Orizaba, Veracruz. 

 Distribution : Near Orizaba. 



3. Mascagnia volubilis (Sims) Niedzu. Gen. Masc. 22. 1908. 



Malpighia volubilis Sims, Bot. Mag. pi. 809. 1805. 

 Bvrsonima volubilis DC. Prodr. 1 : 518. 1824. 

 Hiraea Simsiana A. Juss. Ann. Sci. Nat. II. 13: 259. 1840. 

 Mascagnia Simsiana Griseb. Fl. Brit. W. Ind. 121. 1859. 

 Hiraea schizoplera Turcz. Bull. Soc. Nat. Mosc. 361 : 5S4. 1863. 



Branches dark, roughened with wart-like lenticels ; leaf-blades ovate to ovate-lanceo- 

 te or oblong-lanceolate, mostly 6-14 cm. long, somewhat acuminate, but often rather 

 blunt at the tip, glabrous, at least ultimately so, abruptly narrowed or rounded at the base, 

 stout-petioled, the petiolar glands inconspicuous or obsolete ; sepals ovate to oblong-ovate, 

 3.5-4.5 mm. long, the glands more than one half the length of the sepal-body; petals 

 yellow, nearly or quite similar, mostly 9-11 mm. long, the blades erose and with rather 

 sharp basal auricles; samaras 3-4.5 cm. wide, the lateral wings flabellate or cuneate-flabel- 

 late, copiously pubescent, deeply erose or incised. 



Type locality : West Indies. 



Distribution : Leeward and Windward Islands. 



Illustration : Bot. Mag. pi. S09. 



4. Mascagnia jamaicensis Urban & Niedzu.; Niedzu. 



Gen. Masc. 25. 1908. 

 Branches pale, smooth ; leaf-blades ovate-lanceolate to oblong-lanceolate or nearly 

 oblong, 7-14 cm. long, acute or slightly acuminate at the apex, glabrous, slightly paler 

 beneath than above, abruptly narrowed or rounded at the base, short-petioled, the petiolar 

 glands, usually present and conspicuous, borne near the base of the blade ; sepals ovate to 

 suborbicular, 3^1 mm. long, the glands less than one half the length of the sepal-body; 

 petals yellow, 7.5-11 mm. long, four of them nearly similar, with undulate blades which 

 are slightly auricled at the base, the fifth petal very different from the others, several- 

 lobed, the lobes several times forked into very slender segments; samaras 2.5-3.5 cm. 

 wide, the lateral wings broadly cuneate, glabrous or sparingly pubescent, thin. 



Type locality : Jamaica. 

 Distribution: Jamaica. 



5. Mascagnia Buchii Urban & Niedzu.; Urban, Symb. 



Ant. 2 : 452. 1901. 

 Leaf-blades linear to linear-lanceolate, oblong-linear, or oblong-ovate, 1.5-6 cm. long, 

 acute or slightly acuminate, shining, reticulate, sparingly, but inconspicuously, fine-pu- 

 bescent, bright-green on both sides, short-petioled ; flower-stalks stout, stiff ; sepals ovate, 

 2-2.5 mm. long, glabrous or nearly so, the glands fully one half as long as the sepal-body ; 



