Part 3, 1911] RUTACEAE 201 



1.6-S cm. long, 0.8-4 cm. broad, rounded or retuse at the apex, somewhat narrowed below 

 to an obtuse or rounded base, thickish and rather rigid, finely reticulate, smooth above, 

 tomentulose and scarcely paler beneath ; flowers not seen ; inflorescence short, terminal ; 

 fruiting pedicels 1-3 together, 1.3 cm. in length or less; mature capsule tuberculately 

 roughened, about 2 cm. in diameter; seeds subglobose, 6.5-7 mm. in diameter, brown or 

 blackish, smooth, the scar white, narrow, linear, 1 mm. in breadth. 



Type locality : I,a Tinaja, Sonora. 

 Distribution : Sonora and Sinaloa. 



2. Esenbeckia flava Brand. Zoe 1 : 378. 1891. 

 A shrub or small tree, sometimes attaining a height of 7 m. and a trunk-diameter of 

 15-20 cm., the young branches, panicles, and lower surface of the leaves tomentose ; peti- 

 oles velvety, 1-2 cm. long; leaves simple, oblong-elliptic to oval or sometimes oblong- 

 obovate, entire or obsoletely crenulate, 5-10 cm. long, 2.8-5 cm. broad, usually retuse or 

 emarginate at the apex, more or less inequilateral at the base; flowers 1.3-1.4 cm. in 

 diameter, in terminal panicles which are usually longer than the leaves ; sepals ovate to 

 broadly ovate, 2 mm. long; petals oblong-oval, oblong-ovate, or sometimes ovate, 4-6 mm. 

 long, 2.5-5 mm. broad ; filaments accumbent in the shallow grooves of the disk, at length 

 reflexed ; anthers apiculate ; ovary immersed in the disk, densely verrucose-echinate ; style 

 cylindric or slightly clavate ; stigma capitate, obscurely lobed ; capsule depressed-globose, 

 3-4 cm. broad, 2 cm. thick, more or less strongly verrucose-echinate ; seeds broadly ovoid- 

 conic, 10-11 mm. broad, dark-brown. 



Type locality : San Jose del Cabo, Lower California. 

 Distribution : Cape region of Lower California. 

 Illustration : Zoe 1 : pi. 12. 



3. Esenbeckia macrantha Rose, Contr. U. S. Nat. 

 Herb. 5: 111. 1897. 

 A tree 4.5-6 m. high, the young branches and inflorescence hirsutulous ; leaves digi- 

 tately 3-foliolate, alternate, long-petioled ; leaflets oblong to lance-elliptic, 15-20 cm. long, 

 5-7.5 cm. broad, short-acuminate at the apex, somewhat oblique at the base, green and 

 lustrous above, paler and hirsutulous beneath, strongly veined ; inflorescence paniculate ; 

 flowers 8.5-10 mm. broad ; sepals broadly ovate to orbicular or broadly triangular ; petals 

 oblong-ovate to ovate. 5-5.5 mm. long, fleshy; filaments accumbent in the shallow grooves 

 of the disk ; disk large, 3.S-4.1 mm. in diameter; fruit not seen. 



Type locality : Canyon along wagon road six miles above Dominguillo, state of Oaxaca. 

 Distribution : Southern Mexico. 

 Illustration : Contr. U. S. Nat. Herb. 5 : pi. 2. 



4. Esenbeckia pentaphylla (Macfad.) Griseb. Fl. Brit. 

 W. Ind. 135. 1859. 



Galipea pentaphylla Macfad. Fl. Jam. 1 : 196. 1837. 



A tree up to about 10 m. in height, with brownish or grayish-brown bark ; branches of the 

 hiflorescence usually bearing close-set pustule-like glands, and puberuleut; leaves alternate, 

 digitately 3-5-foliolate ; leaflets oblong to oblong-oval, or sometimes obovate, 6-17 cm. long, 

 2.8-7 cm. broad, glabrous, rounded or obtuse at the apex, rounded or cuneate and often 

 l nequilateral at the base ; flowers 6.5-8 mm. in diameter, in terminal, many-flowered 

 corvmbiform panicles; sepals orbicular-ovate to nearly orbicular, unequal, imbricate, 

 ciliolate, minutely puberulent externally ; petals oblong to oblong-elliptic, occasionally 

 oblong-ovate, 2.8-4 mm. long, 2-2.5 mm. broad, yellowish, rounded or obtuse at the apex, 

 spreading, minutely puberulent externally and glandular-dotted ; filaments subulate, ac- 

 cumbent in the shallow grooves of the disk ; disk 2.6-3 mm. in diameter ; mature capsule 4-5 

 cm. broad, 5-beaked at the apex, coarsely wrinkled and often bearing a few obtuse, com- 

 pressed tubercles 2-5 mm. in length ; seeds brown or somewhat blackish-brown, obliquely 

 compressed deltoid-ovoid, short-beaked, about 1-1.3 cm. long, 6.5-9 mm. broad, lustrous. 



Type locality : Jamaica. 



Distribution : Jamaica ; also reported from Yucatan. 



