194 LOASACE.E. (lOASA FAMILY.) 



* Seeds feic, ohlong, not ivinged ; petals 5, )wt large; Jilaments all filiform. 



1. M. oligosperma, Nutt. Rough and adhesive (1-3° high), much 

 branched, the brittle branches spreading ; leaves ovate and oblong, cut-tootlied 

 or angled, often petioled ; flowers yellow (7 - 10" broad), opening in sunshine ; 

 petals wedge-oblong, pointed; stamens 20 or more; capsule small, about 9- 

 seeded. — Prairies and plains, 111. to Kan. and Col., south to Tex. 



* * Seeds numerous, rounded and icing-margined ; petals 10, large and showg ; 

 outer filaments petaloid in n. 3; capsule large, ohlong ; leaves sessile. 



2. M. ornata, Torr. & Gray. Stout, 1 - 2° liigli ; leaves oblong-lanceolate, 

 deeply repand-tootlied or pinnatifid, the segments acute ; calyx-tube leafy-brac- 

 teate ; petals 2-3' long, yellowish-white ; filaments all filiform or the outer 

 dilated below ; capsule U- 2' long ; seeds narroAvly margined. — On the plains, 

 western part of the Dakotas to central Kan. and Tex. 



3. M. nuda, Torr. & Gray. More slender, 1-5° high ; lea^^es somewhat 

 lanceolate, rather bluntly or shortly repand-dentate ; flowers ha^J as large as 

 in the last ; calgx nothracteate ; outer filaments narroidij dilat.ed,steT\\e ; capsule 

 about V long; seeds plainly wm^rec/. — Plains, Dakotas to cen. Kan. and Tex. 



Order 44. PASSIFLOKACEyE. (Passion-Flower Family.) 



Herbs or tuoodg jjlants, climbing by tendrils, with perfect flowers, 5 mo7ia- 

 delplwus stamens, aiid a stalked 1-celled ovary free from the calyx, ivith 3 or 

 4 parietal placentce, and as many club-shaped styles. 



1. PASSIFLORA, L. Passiox-Flower. 



Calvx of .5 sepals united at the base into a short cup, imbricated in the bud, 

 usuallv colored like the petals, at least witliiu ; the tliroat crowned with a double 

 or triple fringe. Petals .5, on the throat of the calyx. Stamens 5 ; filaments 

 united in a tube which sheathes the long stalk of the ovary, separate above ; 

 anthers large, fixed by the middle. Berry (often edible) many-seeded; the 

 anatropous albuminous seeds invested by a pnlpy covering. Seed-coat brittle, 

 grooved. — Leaves alternate, generally palmately lobed, with stipules. Pedun- 

 cles axillary, jointed. Ours are perennial herbs. (An adaptation otflos passi- 

 onis, a translation otfior della passione, the popular Italian name early applied 

 to the flower from a fancied resemblance of its parts to the implements of the 

 crucifixion.) 



1. P. lutea, L. Smooth, slender; leaves obtusely 3-lohed at the summit, the 

 lobes entire; petioles glaudless; flowers greenish-yellow (T broad) ; fruit Y iu 

 diameter. — Damp tliickets, S. Penn. to Fla., west to 111., Mo., and La. 



2. P. incarnata, L. Pubescent; leaves 3-5-cleft, the lobes serrate, the 

 base bearing 2 glands ; flower large (2' broad), nearly white, with a triple 

 purple and flesh-colored crown ; involucre 34eaved ; fruit as large as a hen's 

 egg. — Dry soil, Va. to Fla., west to Mo. and Ark. Fruit called maypops. 



Order 45. CUCURBITACE^E. (Gourd Family.) 



Mostly succulent herbs with tendrils, dioecious or monoecious {often gamo- 

 pelalous) flowers, the calyx-tube cohering with the 1 - 3-celled ovary, and the 



