PA SSIFL OR A CEA EL OA SA CEA E. 64 1 



Family 6. PASSIFLORACEAE Dumort. 



Passion-flower Family. 



Woody vines, climbing by tendrils, or erect herbs, with petioled 

 usually palmately-lobed leaves, and perfect regular flowers. Calyx-tube 

 persistent. Petals usually 5, inserted on the throat of the calyx, distinct, 

 or in some species united. Stamens 5. Throat of the calyx crowned 

 with a double or triple fringe. Filaments subulate or filiform, mona- 

 delphous, or separate. Ovary free from the calyx, i -celled ; placentae 

 3-5, parietal ; styles 1-5. Fruit a berry or capsule, usually many-seeded. 

 About 1 8 genera and 325 species, of warm and tropical regions, most 

 abundant in S. Am. 



i. PASSIFLORA L. 



Climbing tendril-bearing vines, with alternate or rarely opposite leaves, and 

 large axillary flowers, on jointed, often bracted, peduncles. Calyx-tube cup- 

 shaped or campanulate. 4-5-lobed, the lobes narrow, imbricated in the bud, its 

 throat crowned with a fringe called the corona. Petals 4 or 5 (rarely none), 

 inserted on the throat of the calyx. Ovary oblong, stalked. Filaments mona- 

 delphous in a tube around the stalk of the ovary, separate above; anthers narrow, 

 versatile. Fruit a many-seeded berry. Seeds pulpy-arilled, flat, ovate; endosperm 

 fleshy. [Flower of the Cross, or Passion, as emblematic of the crucifixion.] 

 About 250 species, mostly of tropical Am., a few in Asia and Australia. Besides 

 the following, about 7 others occur in the southern and southwestern States. 



Leaves deeply 3-5-lobed; lobes serrate; petals whitish; corona purple, i. P. incarnata. 

 Leaves obtusely 3-lobed above the middle, the lobes entire ; flower yellowish. 



2. P. lutea. 



1. Passiflora incarnata L. PASSION-FLOWER. PASSION-VINE. (I. F. f. 

 2515.) Stem glabrous, or slightly pubescent above. Petioles 1-5 cm. long, with 

 2 glands near the summit; leaves nearly orbicular in outline, glabrous, or often 

 somewhat pubescent, 7-13 cm. broad, somewhat cordate at the base, the lobes ovate 

 or oval, acute or acutish, finely serrate; flowers solitary, 3-5 cm. broad; peduncles 

 usually 3-bracted just below the flowers; calyx-lobes linear; berry ovoid, nearly 

 5 cm. long, glabrous, yellow. In dry soil, Va. to Mo., Fla. and the Ind. Terr. 

 Fruit edible, called Maypops. May-July. 



2. Passiflora lutea L. YELLOW PASSION-FLOWER. (I. F. f. 2516.) Gla- 

 brous or nearly so, climbing or trailing. Petioles 1-3 cm. long; leaves much 

 broader v ^ian long, more or less cordate at base, with 3 wide obtuse rounded lobes, 

 the lobes entire; stipules 2-3 mm. long; peduncles usually in pairs from the upper 

 axils; flowers greenish-yellow, 1-2 cm. broad; calyx-lobes linear; berry globose- 

 ovoid, 10-12 mm. in diameter, glabrous, deep purple. In thickets, Penn. to Kans., 

 Fla. and La. May-July. 



Family 7. LOASACEAE Reichenb. 



Loasa Family. 



Herbs, often armed with hooked stinging or viscid hairs, with estipu- 

 late leaves, and regular, perfect, white yellow or reddish flowers. Calyx- 

 tube adnate to the ovary, its limb 4-5-lobed, persistent. Petals 4 or 5, 

 inserted on the throat of the calyx. Stamens oo , inserted with the 

 petals ; filaments filiform, commonly arranged in clusters opposite the 

 petals; anthers introrse. Ovary i -celled (rarely 2-3-celled), with 2-3 

 parietal placentae ; ovules anatropous. Capsule usually i -celled, crowned 

 with the calyx-limb. Seeds mostly numerous ; endosperm scanty. 

 About 13 genera and 200 species, all but i natives of America. 



i. MENTZELIA. L. 



Erect herbs, sometimes woody, with alternate leaves, and usually showy 

 flowers. Calyx- tube cylindric, obconic, or club-shaped, its limb generally 5-lobed. 



