318 ORDER LIII. PASSIFLORACEiE. 



8. M. scabba'tum, (Mich.) Stem terete, floating, taking roots at the 

 lower joints. Leaven yerticillate ; the upper linear, pinnatifid, tho 

 lower setaceous. Flowers verticillate, small, sessile. Stamens 4 — 6. 

 Carpels 2, ridged on the back. — Pale purple. If. April — June. Shal- 

 low ponds. 10 — 12 inches. 



Order LI.— LOASA'CELE. 



Calyx 5-lobed. Petals 5, sometimes 10, the inner ones usu- 

 ally smaller. Stamens numerous, the outer ones often petaloid. 

 Ovary inferior, 1 -celled. Fruit a capsule, 1-celled, about 6- 

 seeded. Seeds anatropous. 



Genus I— MENTZE'LIA. L. 11—1. 



Genus same as the order. 



1. M. Florida'na, (Nutt) Herbaceous plant, covered with rigid, 

 barbed hairs. Leaves deltoid-ovate, acute, unequally toothed, truncate, 

 and 2-lobed at the base. Petals cuneate-oval, a little longer than the 

 stamens. Capsule clavate. Seeds ovate, striate. — Yellow. East 

 Florida. 



Order LIL— TURNERA'CEiE. 



Sepals 5, united into a funnel-shaped tube ; segments equal. 

 Petals 5, equal, inserted on the calyx. Stamens 5, alternate 

 with the petals. Anthers introrse. Ovary 1-celled, with 3 pa- 

 rietal placentas. Ovules numerous. Styles 3. Capsule 3-valv- 

 ed, with loculicidal dehiscence. Seeds numerous. Herbaceous 

 plants. Leaves simple, alternate. 



Genus I.— TUR'NERA. Plum. 5—3. 

 (In memory of Win. Turner.) 



Petals longer than the calyx. Stigmas many-cleft. 



1. T. cistoi'des, (L.) Stem simple, hirsute, with bristly hairs. Leaves 

 alternate, oval, obtuse, crenate, hairy, nearly sessile. Flowers solitary, 

 axillary ; peduncles articulated toward the summit. Petals obovate. 

 Anthers sagittate. Capsule globose, villous. Seeds reniform. — Yellow. 

 1i . June — Sept. Barren soils. Georgia, Florida. 12 — 18 inches. 



Order LIIL— PASSIFLORA'CE^E. 



Sepals 4 — 5, united at the base. Petals 4 — 5, inserted into 

 the throat of the calyx, sometimes wanting. Stamens 4 — 5, 

 monadelphous. Anthers introrse. Ovary stipitate, 1-celled, 

 with 3 — 4 parietal placentas. Styles 3 — 4, clavate, a filamen- 

 tous crown inserted into the calyx within the petals. Fruit 

 fleshy, indehiscent. Seeds numerous, anatropous. Climbing 

 herbaceous plants, with alternate leaves. 



