246 



544. PERIPLOCA. 



544. PERIPLOCA. 



1. ^seca. Twisting. L. ovate or oblong, 

 acuminate. Corymbs axillary, on long stalks. 

 Cor. viUons witliin. Anthers obtuse. s.S. 

 6, 7- Woods. Pisa. Otranto. 



545. GOMPHOCARPUS. 



1. fruticosus. L. opposite, lineari-lanceo- 

 late, smooth. L. and Pl.-staEcs downy. Um- 

 bels on short stalks, nodding. s.S. 6, 7- 

 Cors. and Sard. 



546. ASCLEPIAS. 



1. Comuti. Stem simple. L. oval, flat, 

 tomentose beneath. Stalks of the head or 

 umbel extra- axillary. Eollicles ovate, covered 

 with soft spines, p. 6-8. Escapes. Romain- 

 ville. Malesherbes. 



547. STAPELIA. 



1 . europsea. Stems short, square, smooth. 

 Fl. fasciculate. Pil. quite simple, r/ith 3 

 glands. s.S. 7-11- Lopadusa. 



LXV. GENTIANE^. 



Corol 1 a regular, 4-8-cleft, inferioi", marcescent. 

 the edges meeting or slightly inflexed. 



548. MENYANTHES. 



1. trifoliata. L. ternate, quite smooth, on 

 long stalks, p. 4, 5. Wet peaty. 



549. VILLARSIA. 



1. nymphseoides. L. cordato-sobrotuud, 

 punctato-glandulose beneath, floating. Um- 

 bels axUlai-y, sessile. Cor. fi-inged. p. 7- 

 Still water. 



550. CHLORA. 



1. perfoliata. L. triangulari-ovate, united 

 at the base in their whole width. Cal. divided 

 to base. Div. linear, acute. Div. of Cor. 

 obtuse. a. 7, 8. Dry pastures. {Moist 

 meadows, Koch.) 



2. serotina. L. cordato-eUiptic, slightly 

 connate. Cal. divided to base. Div. linear, 

 acuminate or lanceolato-subulate. Div. of 

 Cor. somewhat acute, a. 8-10. Peaty mea- 

 dows, Rheinthal. Sandy, Nap. 



j3. acuminata. Div. of Cor. acuminate. 



3. sessilifolia. L. ovato -lanceolate, slight- 

 ly connate. Cal. divided about half way. 

 Div. lanceolate, a. 6. Shore. Rochelle. 

 mdt. Fr. 



551. SWERTIA. 



1. perennis. Cor. 5-partite. Stalks 4- 

 edged, somewhat winged. Stem simple. Root- 

 L. oval, (elliptic, Koch), p. 7, 8. Peaty 

 mountain meadows. Alps. Pyr. Vosges. Riesen- 

 gebirge. 



-33stivation convolute. Ovary of 3 carpels. 



552. LOMATOGONIUM. 



1, carinthiacuiu. Mouth of Cor. bearded. 

 Div. of Cal. lanceolate. L. ovate, acute. Root- 

 L. obovate, obtuse. Fl.-stalks long, naked, a. 

 8-10. Stony, and beds of torrents. Salzb. 

 Carin. s. Tyrol. 



553. GENTIANA. 



A. Tube of CoroUa short, or greatly en- 

 larged at the mouth. 



i. Flowers in whorls or heads. 



a. CoroUa without accessory plaits. Sp. 

 1-5. 



b. Corolla with accessory plaits. 



* Calyx a sheath, divided on one 

 side. Sp. 6-8. 



** Calyx campanulate. Teeth nearly 

 equal. Sp. 9-11. 



ii. Flowers solitary or in pairs. Sp. 12- 

 17. 



B. Tube of Corolla cylindrical or somewhat 

 barreled. 



i. Perennial. Stems simple, 1 -flowered, 

 with barren shoots. Sp. 18-24. 



ii. Stems branched; no barren shoots. 

 Sp. 25-27. 



C. Throat of Corolla bearded ! 



i. Calyx tubular, with 4-5 Teeth. Sp. 28- 



31. 

 ii. Calyx 4-5-partite. Sp. 32, 33. 



D. Throat naked. Segments fringed ! Sp. 34. 



