1096 MARTYNIACEAE 



5. CHILOPSIS D. Don. 



Shrubs or trees, with furrowed bark and dark-colored coarse-grained wood. Leaves 

 opposite or alternate, deciduous, without stipules : blades narrow, thin, entire, often 3- 

 nerved, sometimes glutinous. Flowers perfect, showy, white, tinged with purple, in 

 terminal puberulent racemes or thyrsoid panicles, with narrow bracts. Calyx membra- 

 nous, splitting into 2 concave lobes. Corolla oblique, enlarged at the throat and blotched 

 with yellow, inconspicuously bilabiate, the upper lip 2-lobed, the lower 3-lobed, the mar- 

 gins undulate, the central lobe larger than the rest. Stamens 4, adnate together with a 

 staminodium to the base of the corolla-tube, mostly included : filaments filiform, the 2 pos- 

 terior much shorter than the anterior pair : anther-sacs divergent. Ovary 2-celled, sessile 

 on the nearly obsolete annular disk : style filiform : stigmas 2. Ovules numerous, hori- 

 zontally borne in many rows in the central placenta, anatropous. Capsule narrow, elon- 

 gated, tapering to both sides, loculicidally 2-valved. Seeds numerous, in 2 ranks, flattened, 

 notched at both ends, with a membranous testa which is produced into lateral fimbriate 

 wings. Endosperm wanting. Embryo with cotyledons which are much broader than long. 



1. Chilopsis linearis (Cav. ) DC. A straggling shrub or small tree, sometimes 9 m. 

 tall. Leaves numerous ; blades linear, 10-20 cm. long, acuminate, rather prominently 

 nerved, gradually narrowed to the base, or short-petioled : racemes 6-10 cm. long, villous : 

 calyx short-pedicelled ; lobes acute, villous, several-toothed at the apex : corolla white, 

 with a shading of purple, funnelform ; lobes suborbicular, about 1 cm. in diameter, crisped : 

 capsules narrowly linear, 10-20 cm. long : seeds nearly 1.5 cm. long, bearded at both ends. 



Along streams, Texas to southern California and Mexico. 



6. CRESCENTIA L. 



Glabrous trees, with scaly bark and stout terete or angled branchlets. Leaves alter- 

 nate, without stipules : blades leathery or membranous, solitary or fascicled, entire. 

 Flowers perfect, clustered or solitary at the ends of branchlets. Calyx leathery, at length 

 split into 2 lobes, or 5-cleft, deciduous. Corolla pale-yellow, striped with purple, oblique, 

 tubular-campanulatc : tube constricted near both ends and swollen on the lower side : limb 

 inconspicuously bilabiate, obscurely 5-lobed, the lobes laciniate-toothed. Stamens 4, adnate 

 together with a posterior staminodium, to the lower part of the corolla-tube, slightly 

 xserted or included : filaments filiform : anther-sacs divergent. Ovary 1-celled, sessile 

 on a thick annular disk : style filiform : stigmas 2. Ovules numerous, borne on two 2-lobed 

 parietal placentae, anatropous. Capsule short and stout, indehiscent. 



Leaf-blades spatulate or oblanceolate, usually thrice as long as broad : capsules over 12 cm. long. 



1. C. Cujete. 

 Leaf-blades oblong to oblong-obovate, about twice as long as broad : capsules less than 12 cm. long. 



2. C. ovata. 



1. Crescentia Cujete L. An evergreen tree 5-10 m. tall, with glabrous foliage. 

 Leaves clustered ; blades leathery, spatulate or oblanceolate, 8-15 cm. long, abruptly 

 acuminate, gradually narrowed to short-winged petioles : pedicels longer or shorter than 

 the peduncles : calyx glabrous, 2-2.5 cm. long; lobes obtuse, little longer than broad: 

 corolla yellowish white, stout, tubular, 5-6 cm. long ; lobes crisped, usually acute, much 

 shorter than the tube : capsules subglobose or oval, 1.5-3 dm. in diameter. 



In sand, Key West, Florida. Also in the West Indies. 



2. Crescentia ovata Burm. f. An evergreen tree rarely 7 m. tall, with glabrous 

 foliage. Leaf -blades leathery, oblong to oblong-ovate, 7-15 cm. long, abruptly pointed at 

 the apex, acuminate at the base, short-petioled : pedicels 2-8 cm. long, in terminal clusters: 

 calyx glabrous ; lobes 2.5-4 cm. long, obtuse : corolla dull purple or creamy on the lower 

 side, tubular-funnelforrn, 5-6 cm. long ; tube indented below ; limb oblique, with a re- 

 flexed upper lip : capsules green, oblong or oval, 6-10 cm. long, blunt-pointed, obscurely 

 4-ridged : seeds 2-lobed, about 2 cm. broad, somewhat shorter. 



In sand, Florida. Also in the Antilles and tropical America. 



FAMILY 18. MARTYNIACEAE Link. UNICORN-PLANT FAMILY. 



Annual or perennial stocky herbs, with thick branching stems. Leaves op- 

 posite or rarely alternate: blades expanded, thick, simple, mostly contracted 

 into petioles. Flowers perfect, irregular. Calyx inferior, sessile or stalked : 



