806 PASSIFLORACEAE 



5 distinct petals and no staminodia. Gynoecium a compound pistil. Ovary 

 1-celled, or sometimes spuriously 5- celled, free, sessile. Stigmas 5, sessile. 

 Ovules numerous, inserted in two or many series on the 5 placentae. Fruit a 

 fleshy berry, indehiscent. Seeds numerous, flattened, with a variously rough- 

 ened testa. Endosperm fleshy. Embryo axile. [Caricaceae Dumort.] 



1. CARICA L. 



Characters of the family. CUSTARD APPLE. PAPAW. 



1. Carica Papaya L. A small tree, with a simple wand-like stem, 3-6 m. tall, leafy 

 at the top. Leaves large ; blades thick, suborbicular in outline, 2-6 cm. broad, mostly 

 palmately 7-lobed, pale or glaucous beneath, each lobe pinnately lobed, the segments 

 obtuse or acute, or the larger ones often acuminate ; petioles stout : staminate flowers in 

 slender panicles 1-several dm. long, the ultimate clusters rather dense : calyx of the stami- 

 nate flowers 1-1.5 mm. high, that of the pistillate flowers 5-10 mm. high, the lobes longer 

 than the tube, curved like the bractlets : corolla yellow or reddish, that of the staminate 

 flowers 2.5-3 cm. long ; tube slender, dilated near the top ; lobes lanceolate or elliptic- 

 lanceolate, barely as long as the tube : corolla of the pistillate flowers longer : petals 

 distinct, lanceolate, twisted : berries oblong to subglobose, mainly 2-12 cm. long, yellow or 

 orange, with a milky juice. 



In woods, peninsular Florida and the Keys. Throughout tropical America. Two well-marked 

 forms occur in Florida ; the one with a slender green stem and relatively small fruit, the other with a 

 stout purple or purplish stem and large fruit. 



FAMILY 2. PASSIFLORACEAE Dumort. PASSION-FLOWER FAMILY. 



Perennial, mostly tropical herbs, vines or shrubby plants, often climbing by 

 means of tendrils, with poisonous emetic and narcotic roots. Leaves alternate : 

 blades simple or rarely compound : stipules usually present. Tendrils arising 

 from the axils of the leaves. Inflorescence axillary. Flowers perfect or rarely 

 polygamous, regular. Calyx of 5 partially united sepals. Corolla of 5 petals 

 inserted in the throat of the calyx, near a filamentous crown, or obsolete. An- 

 droecium of 5 stamens. Filaments monadelphous, adhering to the stalk of the 

 ovary. Gynoecium a compound pistil. Ovary usually stalked, 1-celled, with 

 parietal placentae. Styles as many as the placentae, usually 3, club-shaped. 

 Ovules numerous, anatropous. Fruit fleshy, berry-like, indehiscent. Seeds 

 numerous, enclosed in a pulp, with a brittle sculptured testa. Endosperm thin, 

 fleshy. Embryo straight in the axis of the endosperm. 



1. PASSIFLORA L. 



Perennial herbaceous or shrubby vines, climbing by simple lateral tendrils. Leaf- 

 blades entire, lobed or variously parted. Flowers perfect, usually showy, solitary or 

 clustered in the axils, or racemously disposed. Calyx sometimes colored : lobes 4-5, 

 narrow, sometimes horned near the apex. Petals 4-5, about as long as the calyx, or 

 rarely wanting. Crown single, double or triple, its filaments spreading, often filiform. 

 Stamens 4-5 : filaments adnate below to the gynophore : anthers elongated, versatile. 

 Stigmas 3, capitate. Berry dry or pulpy. Seeds flattened. PASSION-FLOWER. 



Peduncle bearing a conspicuous involucre of 3 bracts near the calyx. 



Leaf-blades hastately lobed : bracts of the involucre pinnately 1-3-divided into very slender segments. 



Leaf-blades palmately lobed : bracts of the involucre entire. 2. P. incarnata. 



Peduncle without an involucre, or this obsolete. 

 Petioles without glands. 



Peduncles destitute of bractlets: upper leaf-blades with lobes broader than long. 3. P. lutea. 

 Peduncles with 2 or 3 bractlets : upper leaf-blades with lobes about as broad as 



long. 4 - P- afflms. 



Petioles with glands at the middle or at the base of the leaf-blade. 

 Glands of the petiole conspicuously remote from the blade. 



Upper leaf-blades lobed nearly to the base : peduncles shorter than the 



petioles. 5. P. inamoena. 



Upper leaf-blades shallowly lobed : peduncles surpassing the petioles. 6. P. suberosa. 



Glands of the petiole contiguous with blade or approximate to it. 



A. Foliage glabrous or sparingly pubescent : peduncles solitary or by pairs. 



a. Glands elevated from the petioles. . , 



Leaf-blades mostly entire. 7. P. P aUld f:.j... 



Leaf-blades mostly 3-lobed. 8. P. angusttfolia. 



