138 



ASCLEPIADE^E. XXXIX. GONOLOBUS. 



leaves ovate-cordate. Tj . / ^ > . S. Native of America. Cynan- 

 chum hirtum. Lin. hort. clifT. p. 79. Willd. spec. 1. p. 1256. 

 Mor. hist. 3. p. 511. sect. 15. t. 3. f. 61. Stems chinky at 

 bottom. This is a very doubtful plant. Leaves larger than in 

 G. suberosus ; and the flowers are larger and purplish. 

 Rough Gonolobus. Shrub tw. 



15 G. PROSTRA'TUS (R. Br. 1. c.) stems prostrate, downy; 

 leaves reniformly cordate, acute, tomentose beneath ; umbels 

 small, few-flowered ; segments of corolla linear, obtuse. I/ . '"' 

 G. Native of Mexico. Cynanchum prostratum, Cav. icon. 1. 

 p. 5. t. 7. Willd. spec. 1. p. 1257. Corollas green, small. 

 Peduncles downy, almost the length of the leaves. 



Prostrate Gonolobus. Fl. July, Aug. Clt. 1823. PI. pros- 

 trate. 



16 G. UNDULA'TUS (R. Br. 1. c.) glabrous; leaves oblong, 

 acuminated, attenuated at the base, undulated ; umbels capitate ; 

 calycine segments ovate, concave, spreading ; segments of corolla 

 bluntish, much shorter than the tube. 1? . r> . S. Native near 

 Carthagena, on Mount de la Popa. Tube of corolla depressedly 

 globose. Corollas small, cinereous outside, and dirty purple inside. 



Undulated-leaved Gonolobus. Shrub tw. 



17 G. ALTISSIMUS (Roam, et Schultes, syst. 6. p. 65.) stem 

 tomentose or downy ; leaves cordate, tomentose on both sur- 

 faces ; umbels dense, capitate ; calycine segments lanceolate, 

 concave, tomentose outside, length of the tube of the corolla ; 

 segments of the corolla roundish, flat, obtuse. Tl . / "\ S. Native 

 of woods, about Carthagena. Cynanchum altissimum, Jacq. 

 amer. 84. t. 87. Vahl, eel. 2. p. 23. Corollas dirty purple. 



Tallest Gonolobus. Fl.? PI. tw. 



18 G. FILIFORMIS (Roem. et Schultes, syst. 6. p. 65.) gla- 

 brous ; leaves ovate, acuminated, shining ; umbels globose ; 

 calycine segments lanceolate, concave, acuminated ; segments of 

 corolla ovate, acuminated, pilose beneath. If . / *\ S. Native of 

 Carthagena, among bushes. Cynanchum filiforme, Jacq. amer. 

 p. 86. t. 60. f. 1. Cynanchum leucanthum, Jacq. amer. pict. t. 

 86. Stems filiform, shining. Peduncles twice longer than the 

 petioles. Flowers very small, white. 



Filiform-stemmed Gonolobus. PI. tw. 



19 G. A'LBUS (Poir. suppl. 2. p. 815.) glabrous; leaves ovate, 

 acute, white below ; umbels many-flowered. If. . r> . S. Native 

 of Peru. Asclepias alba, Cav. icon. p. 136. t. 310. Leaves 

 subcordate, 2 inches long. Umbels sometimes twin. Corollas 

 whitish-grey, \ an inch in diameter. 



White-flowered Gonolobus. PI. tw. 



20 G. OBTUSIFOLIUS (Roem. et Schultes, syst. 6. p. 66.) leaves 

 roundish-cordate, soft and tomentose beneath, y.. ^\ S. Na- 

 tive of South America, Cayenne. ? Asclepias (Gonolobium) ob- 

 tusifblium, Pers. ench. 1. p. 274. 



Blunt-leaved Gonolobus. PI. tw. 



21 G. DIADEMA'TUS (Ker. bot. reg. t. 252.) hairy ; leaves ob- 

 long-cordate ; segments of corolla ovate, furnished with a corona 

 in the throat, tj . r> . S. Native of Mexico. Flowers green. 



Crowned Gonolobus. Fl. Sept. Oct. Clt. 1812. Shrub tw. 



22 G. OBLIQUUS (R. Br. 1. c.) stems hairy ; leaves ovate-cor- 

 date, vil'.ous, acute ; umbels much shorter than the leaves ; 

 pedicels length of peduncles ; calycine segments narrow-lanceo- 

 late, acute, villous ; segments of corolla ovate, acuminated, with 

 oblique points, and revolute edges, y.. *~*. S. Native of Caro- 

 lina ; but the plant has never been met with by Pursh. Cynan- 

 chum obliquum, Jacq. coll. 1. p. 148. icon. rar. 2. t. 341. Willd. 

 spec. 1. p. 1256. Flowers fetid, an inch in diameter, brownish 

 purple. Nectarium purplish. Anthers yellow. 



Oblique- fiowered Gonolobus. Fl. July, Aug. Clt. 1818. 

 PI. tw. 



23 G. NUTTALLIA'NUS (Spreng. syst. 1. p. 845.) glabrous; 

 leaves reniformly cordate, acuminated, upon longish petioles, 



12 



auriculate at the base ; segments of corolla linear-oblong, ob- 

 lique ; follicles ribbed. 1 . H. Native on the banks of the 

 Mississippi, near St. Louis. G. viridiflorus, Nutt. gen. amer. 

 1. p. 163. Flowers greenish. 



Nuttall's Gonolobus. Fl. July, Aug. Clt. 1822. PI. tw. 



21 G. UNIFLORUS (H. B. et Kunth, nov. gen. amer. 3. p. 207. 

 t. 238.) branches and leaves downy ; leaves ovate-oblong, much 

 acuminated at the apex, and sagittately cordate at the base ; 

 peduncles solitary, 1 -flowered, about the length of petioles ; 

 calycine segments lanceolate, villous ; segments of corolla ob- 

 liquely ovate-oblong, acuminated, bearded on one side, twice 

 longer than the calyx. ^ ^. S. Native near the town of 

 Mexico. Flowers as large as those of Philadelphus coronaria. 

 Corona in the bottom of the corolla, short, annular, undulated. 

 Very like Cyn&nchum denticulalum, Vahl. 



One-flowered Gonolobus. Fl. July. Clt. 1825. Shrub tw. 



25 G. ARISTOLOCHIOIDES (H. B. et Kunth, nov. gen. amer. 3. 

 p. 208.) branches downy, and leaves beneath ; leaves ovate, 

 short-acuminated at top, and deeply cordate at the base ; umbels 

 many-flowered, hardly exceeding the petioles ; peduncles and 

 pedicels downy ; calycine segments ovate, acutish ; segments of 

 corolla ovate-oblong, acute, beardless, 4 times longer than the 

 calyx. I? . ^. S. Native of the province of Caraccas, in humid 

 places, near Guigne, and at Lake Tacaragua. Corolla yellow. 

 Corona and anthers as in G. riparius. 



Arlstolochia-like Gonolobus. Fl. March. Shrub tw. 



26 G. FLOCCOSUS (Bertol. ex Spreng. syst. add. p. 110.) leaves 

 cordate, acuminated, tomentose beneath ; flowers glomerate ; 

 follicles echinated. fj . *"\ S. Native of Guadaloupe. 



Floccose Gonolobus. Shrub twining. 



27 G. PAUCIFLORUS (Spreng. syst. 1. p. 846.) shrubby, gla- 

 brous ; branches downy ; leaves oblong, obtuse ; peduncles 

 usually 3-flowered, axillary. Tj . ^. S. Native of Hispaniola. 



Ferv-jlomered Gonolobus. Shrub twining. 



28 G. RIPA'RIUS (H. B. et Kunth, 1. c.) branches pilose ; 

 leaves ovate, acuminated at apex, deeply cordate at base, rather 

 pilose beneath ; umbels many-flowered ; peduncles and pedicels 

 downy ; calycine segments oblong-lanceolate ; segments of co- 

 rolla oblong-acute, beardless, 3 times longer than the calyx. 



I? . ^. S. Native of New Granada, on the banks of the river 

 Magdalena, between Mompox and Morales. Corolla green, 

 with a short, undulately-curled margin. 

 River-side Gonolobus. Shrub tw. 



29 G. BARBA'TUS (H. B. et Kunth. 1. c. p. 209. t. 239.) 

 branches downy ; leaves ovate, 



acuminated at top, and cordate 

 at the base, with a wide recess, 

 glabrous ; umbels many-flower- 

 ed, about the length of the 

 leaves ; pedicels glabrous, longer 

 than the peduncle ; calycine seg- 

 ments oblong-lanceolate, acumi- 

 nated (f. 17. a); segments of 

 corolla obliquely ovate, acumi- 

 nated (f. 17. b. c.), bearded on 

 one side, twice longer than the 

 calyx. ^2 /n> - S. Native of 

 Mexico, near Campeche. Flowers 

 as large as those of Periploca 

 Grafca, 5-7 in each umbel. Co- 

 rona very short, disk-formed, 

 composed of short, fleshy, bidentate teeth or threads surround- 

 ing the stamens (f. 17. d.) 



/Jearrferf-flowered Gonolobus. Shrub tw. 



Cult. For culture and propagation see Oxypetalum, p. 148. 



FIG. 17. 



