200 NORTH AMERICAN FLORA TVolumb 25 



on both surfaces ; inflorescence racemose, 0.7-3 dm. long, occasionally longer ; pedicels 10- 

 16 mm. long, glabrous; sepals rounded or broadly short-triangular; petals ovate, 4-4.5 

 mm. long, 2-2.5 mm. broad, acute; filaments subulate; anthers ovate ; follicle 9-12 mm. 

 long, S-ll mm. broad, brown or light-brown ; seeds glabrous, 6-9 mm. long, black. 



Type locality : On shady hillsides near Acapulco, Guerrero. 



Distribution : Southern Mexico and Maria Madre Island. 



Very close to narrow-leaved forms of the following species. 



2. Pilocarpus racemosus Yahl, Eclog. 1 : 29. 1796. 



Raputia heterophylla Griseb. Mem. Am. Acad. II. 8: 170. 1860. Not R. keterophylla DC. 1822. 



Pilocarpus heierophyllus A. Gray; Griseb. Inc. cit. 1860. 



Pilocarpus laurifolius Vahl ; Eggers, Bull. U. S. Nat. Mus. 13 : 37, as syn. 1879. 



A shrub or small tree, 2-5 m. tall ; leaflets 1-5, lance-elliptic to oval or obovate, 3.5- 

 17.5 cm. long, 2-9.4 cm. broad, refuse at the apex, cuneate or somewhat rounded at the 

 base, entire, coriaceous, pellucid-punctate; racemes 1.5-3.5 dm. long; pedicels 7-13 mm. 

 long ; petals ovate or oblong-ovate, 3.5-4 mm. long, 2-2.5 mm. broad, acute ; filaments 

 subulate; anthers ovate; follicle 8-11 mm. long, 6-S mm. broad, dark-brown or blackish; 

 seeds glabrous, 5.5-9 mm. long, black. 



Type locality : In high mountains, Montserrat. 



Distribution : Cuba, Porto Rico, Vieques, St. John, Montserrat, Guadeloupe, and Martinique. 



Illustrations: Vahl, Eclog. pi. 10; Plum. PI. Am. pi. 127 ; Mem. Mus. Paris 12 : pi. 22, f. 29. 



7. ESENBECKIA H.B.K. Nov. Gen. & Sp. 7 : 246. 1825. 



Polembryum A. Juss. Mem. Mus. Paris 12 : 519. 1825. 



Trees or shrubs. Leaves alternate or rarely opposite, simple, or 1-5-foliolate ; leaflets 

 pellucid-punctate. Flowers perfect, in terminal or axillary panicles. Calyx 4- or 5-lobed or 

 4- or 5-parted, deciduous. Petals 4 or 5, spreading, imbricate or slightly valvate. Disk 

 annular or cup-shaped, entire or 8- or 10-lobed. Stamens 4 or 5, the filaments subulate, 

 accumbent in the shallow grooves or immersed in the deep grooves of the disk, alternate 

 with the petals ; anthers somewhat heart-shaped, mucronate. Ovary depressed-globose, 

 sessile on the disk or immersed in it, 4- or 5-lobed, 4- or 5-celled, often densely tuberculate. 

 Style basal, short, with a simple, capitate or 4- or 5-lobed stigma. Ovules 2, occasionally 

 solitary in each cell, collateral. Capsule more or less globose, muricate, echinate, or 

 coarsely wrinkled, rarely smooth, splitting septicidally into 4 or 5 carpels, the carpels 

 loculicidally splitting, 1-seeded, or rarely 2-seeded. Seeds exalbuminous, enclosed in an 

 elastic, horny or chartaceous endocarp which in drying separates, splits and curls back eject- 

 ing the seeds; testa cartilaginous; cotyledons large, unequal; radicle short. 



Type species, Esenbeckia pilocarpoides H.B.K. 

 Leaves simple (the petioles not jointed). 



Petioles 1-12 mm. long ; mature capsule when ruptured about 2 cm. broad ; 



endocarp chartaceous. 1. E. Hartmaiiii. 



Petioles 10-20 mm. long ; mature capsule when ruptured 3-4 cm. broad ; 

 endocarp horny. 2. E.Jlava. 



Leaves 1-5-foliolate (the leaflets jointed with the petiole). 



Filaments accumbent in the shallow grooves of the disk ; leaves 3-5- 

 foliolate. 

 Disk large with thick fleshy margins. 2.6-4.1 mm. in diameter ; flower- 

 ing inflorescence 12-24 cm. high ; flowers 6.5-10 mm. broad. 

 Leaves hirsutulous beneath ; branches of the inflorescence hirsutu- 



lous; petals 5-5.5 mm. long. 3. E.macraniha. 



Leaves glabrous ; branches of the inflorescence puberulent ; petals 

 2.8-4 mm. long. 4. E. pentaphylla. 



Disk small with thin margins, 1.2-1.5 mm. in diameter ; flowering inflo- 

 rescence short, 3.7-8 cm. high ; flowers 4.8-5.5 mm. broad. 

 Sepals and petals glabrous or nearly so ; petioles 2-6.8 cm. long. 5. E. Berlandieri. 



Sepals and petals hispidulous ; petioles 1-2 cm. long. 6. E. titoralis. 



Filaments immersed in the deep grooves of the disk ; leaves 1-foliolate, 

 rarely 3-foliolate. 7. E. pilocarpoides. 



1. Esenbeckia Hartmanii Rob. & Fern. Proc. Am. 

 Acad. 30: 115. 1894. 

 A shrub about 2-3 m. in height, with thick twigs, leafy chiefly near the ends; petioles 

 1-12 mm. long, short-pubescent ; leaves simple, oblong to oblong-elliptic or obovate, entire, 



