POLYPETALOUS EXOGENOUS PLANTS. 283 



PASSIFLORA, L. Passion-Flower ; May-Pop. 



Cali/x-tuhe very short ; filaments of the crown in 2 or 

 more rows; fruit baccate; tendrils axillary; peduncles 

 jointed, 1-flowered. 



P. INCARNATA, L. Leaves palmately 3-lobed, acute, 

 serrate; petioles biglandular; peduncles 3-bracted; scjkUs 

 with a hornlike point below the apex, whitish within; 

 filaments of the crown in about 5 rows, the two outer ones 

 as long as the sepals ; herry large, oval ; fruit yellowish, as 

 large as a hen's egg', fioivers purple and white; perennial. 



P. lutea, L. Leaves cordate, broadly 3-lobed at the 

 summit, with the lobes rounded and entire; p>etioles gland- 

 less; fioivers small, greenish-yellow; p)edu7icles by pairs, 

 bractless ; filaments of the crown in 3 rows, shorter than 

 the sepals. 



54. GOURD FAMILY. Order, Cucurbitace^. 



Herhs, with succulent stems, climbing by means of lateral 

 tendrils;' leaves alternate, palmately veined or lobed; 

 fiowers axillary, monoecious or dioecious ; calyx 5-toothed, 

 adnate to the ovary ; corolla of 5 distinct or more or less 

 united petals, coherent with the calyx ; stamens 3-5, free 

 or variously united; aiitliers long, straight or tortuous, 

 commonly connate ; ovary 1-3-celled ; stigmas 3 ; fruit (a 

 pepo) fleshy or pulpy, 1-3-celled ; seeds compressed, ana- 

 tropous, without albumen ; cotyledons leafy. 



SYNOPSIS. 



Petals 5, distimt or united at the base. Ovary Z-celled. Fruit S-seeded, smooth. 



Bykoxta. 



Petals 5, united at the base into a flaitish nearly rotate corolla. Ovary Z-celled. 



Fniit fleshy, echinate, Z-^seeded Discantheha. 



Petals 5, united at the base, a rotate corolla. Ovary '[-celled. Fruit 1-seeded, 



hispid SicYOS. 



