NORTH AMERICAN FLORA [Volume 25 



Styles 6-10, very short; stigmas 6-10, large, connate. Ovules 2 in each cell, superposed or 

 collateral. Capsule of 6-10 carpels, beaked at the apex, and joined at the base, 2-seeded, 

 or by abortion 1 -seeded ; endocarp free. Testa coriaceous. 

 Type species, Pachystigma ptelcoides Hook. 



1. Peltostigma pteleoides (Hook.) Walp. Rep. 5 : 387. 1846. 



Pat hystigma pteleoides Hook. Ic. PI. pi. 698, 699. 1844. 

 Peltostigma penlaphyllum Donn. Smith, Bot. Gaz. 19: 1. 1894. 



A small tree, 5-S m. tall ; leaves 3-5-foliolate, petioled, the leaflets obovate-oblong to 

 elliptic-oblong or elliptic, sometimes ovate, the terminal one 5-20 cm. long, the lateral usually 

 considerably smaller, acute to acuminate at the apex, more or less inequilateral at the base 

 and decurrent on the petiolules, pellucid-punctate, entire or irregularly crenulate ; flowers 

 fragrant, 3-5.5 cm. broad, the exterior sepals ovate to oval, 4-5 mm. long, the interior ones 

 broadly ovate to orbicular, 5-6.5 mm. long ; petals oval to nearly orbicular, sometimes 

 broadly obovate, 1.4-2.5 cm. long, puberulent ; ovary velutinous ; capsule subglobose ; 

 seed oblong, the testa brown. 



Type locality : On the mountains of Santa Cruz, Jamaica. 

 Distribution : Jamaica, southern Mexico, and Guatemala. 



Illustrations: Hook. Ic. PI. pi. 698, 699 ; Bot. Mag. pi. 4436 ; E. & P. Nat. Pfl. 3» : /. 69, 

 N-R ; Baillon, Hist. PI. 4:/. 443, 444. 



13. HELIETTA L. Tul. Ann. Sci. Nat. III. 7: 280. 1847. 



Unarmed shrubs or small trees. Leaves mostly opposite, 3-foliolate ; leaflets entire, 

 pellucid-punctate, sessile. Flowers mostly perfect, in axillary or terminal panicles. Sepals 

 3 or 4, imbricate. Petals 3 or 4, spreading, punctate, imbricate. Disk cup-shaped. 

 Stamens 3 or 4 ; filaments mostly terete ; anthers apiculate. Ovary 3- or 4-celled, verrucose- 

 glandular or hairy, 3- or 4-lobed. Ovules 2 in each cavity. Fruit composed of 3 or 4 inde- 

 hiscent, samara-like, punctate carpels, separating at maturity. Seeds solitary. Cotyle- 

 dons linear-oblong ; embryo slightly curved. 



Type species, Hclietta Plaeana L. Tul. 



1. Helietta parvifolia (A. Gray) Benth. in Hook. Ic. 



PI. 14: 66. 1882. 



Ptelea parvifolia A. Grav ; Hemsl. Biol. Centr. Am. Bot. 1 : 170. 1879. 

 II, lieita parviflora Small, Fl. SE. U. S. 676. 1903. 



A shrub or small tree, with grayish bark and glabrous branches, or when young pubes- 

 cent with short, mostly appressed hairs ; petioles grooved, usualh- hairy ; leaflets some- 

 what coriaceous, the terminal one spatulate, the lateral variable in size, obovate or oblong, 

 obtuse or notched at the apex, 1-4 cm. long, 4-14 mm. broad, sessile ; calyx about 2 mm. 

 broad ; sepals mostly less than 1 mm. long, ovate to nearly triangular ; petals rather thick, 

 ovate to oval, 2.5-3 mm. long, 1.5-2 mm. broad ; carpels pubescent with few, scattered 

 appressed hairs; samara winged only on the upper portion of the back, 1-1.5 cm. long ; 

 seeds linear-oblong, 5.8-6 cm. long, nearly terete, slightly curved, black. 



Type locality: Near Carrizal, Nuevo Leon. 

 Distribution : Texas and Mexico. 



Illustrations: Hook. Ic. PI. pi. 1385; E. & P. Nat. Pfl. 3*: /. 100, H-N ; Sargent, Silva 

 N. Am. pi. 35 ; Sargent, Man. /'. 482 ; Britton, N. Am. Trees /. 528. 



14. SPATHELIA L. Sp. PI. ed. 2. 386. 1762. 



Spathe P. Br.; Crantz, Inst. 2 : 464. 1766. 



Slender unarmed trees with simple unbranched trunks conspicuously marked 

 with leaf-scars, and bearing the leaves and large panicles at the summit ; entire tree 

 dying soon after maturing fruit. Leaves alternate, odd-pinnate, or equally-pinnate 

 through the abortion of the terminal leaflet. Leaflets pellucid-punctate. Flowers polyg- 

 amous. Sepals 5. Petals 5, in aestivation imbricate. Stamens 5, alternating with the 

 petals; filaments appendaged or unappendaged. Ovary 3-celled (rarely 2-celled), 3-angled, 



