LOGANIACEuE. 235 



2. GONOLOBUS. Mick. G<nolobus. 



(From the Greek yovta, an angle, and Ac/Lj, a/jod ; on account of its angular 

 follicles.) 



Calyx 5-parted, the sepals spreading. Corolla rotate, 5- 

 parted. Stamineal crown scutelliform, 5-lobed. Anthers 

 opening transversely, terminated by a membrane. Pollen- 

 masses 5 pairs, not separating into grains. Stigma flattish- 

 depressed. Follicles 2. ventricose, somewhat ribbed. Seeds 

 comose. 



1. G.macrophyllusMich.: stem hirsute with long hairs; leaves broadly 

 ovate-cordate, with the sinus nearly closed, acuminate, finely pubescent, 

 at length smoothish above ; segments of the corolla linear or linear-oblong, 

 with the margin reflexed ; follicles ribbed and angled. G. obliquus Drown. 

 Cynanchum obliquum Muhl. 



Near Philadelphia. Barton. Chester county, Penn. Darlington. July. %. 

 Stem several feet long, twining. Flowers in loose cymose umbels, purple and 

 greenish, fetid. Large-leaved Gonolobus. 



2. G. hirsutus Mich. : stem twining ; younger branches very hairy ; 

 leaves cordate-ovate, or ovate-roundish, attenuate or somewhat obtuse, 

 hairy on both sides ; peduncles shorter than the petiole, few-flowered ; seg- 

 ments of the corolla oblong; follicles muricate. Gonolobium hirsutum 

 Pursh. 



Hedges near streams. Penn. to Car. Pursh. June, July. 1\.. Stem trailing 

 and climbing, 3 4 feet long, pubescent. Leaves slightly auriculate at base. 

 Umbels axillary, 3 4-flowerod. Flowers dark purple. Hairy Gonolobus. 



ORDER LXXX. LOGANIACEJ3. LOGANIADS. 



Calyx inferior, 4 5-parted. Corolla regular or irregular, 

 4 5 or 10-cleft. Stamens 5, arising from the corolla. Ovary 

 2 -celled ; style continuous ; stigma simple. Fruit capsular, 

 drupaceous or berried. Seeds usually peltate, sometimes 

 winged, with fleshy or cartilaginous albumen. Shrubs, herba- 

 ceous plants or tree's. Leaves opposite, entire, usually with 

 stipules in the form of interpetiolary sheaths. 



SPIGELIA. Linn. Worm Grass. 



(In honor of Adam Spigelius, an old botanist of considerable note.) 

 Calyx 5-parted, persistent; the segments linear-subulate. 

 Corolla funnel-form, 5-cleft. Stamens 5. Anthers linear, 

 erect, 2-lobed at base. Capsule ovoid-compressed, didymous, 

 2 -celled, few-seeded. 



S. Marylandica Linn. : stem simple, square, smooth ; leaves opposite, 



