122 ON SOUTH-AMEEICAN APOCTNACEiE. 



in a shortish obtuse acumen ; they have about 12 pairs of divergent nerves, are 3-3| in. 

 long, 1-1 J in. broad, on spreading slender petioles 3-4 lines long ; the inflorescence con- 

 sists of a single flower, solitary ia each axil, on a slender erect peduncle 2 in. long, 

 with a terminal pedicel 3 lines long, supported by a linear bracteole 2^ Knes long; 

 sepals acute, 3 lines long ; coroUa of a purplish red colour, glabrous ; tube 1^ in. long, 

 eyUndrically narrowed at its base for 8 lines, funnel-shaped above, 7 lines broad in the 

 mouth ; segments obtusely dolabriform, 6 lines long and broad, dextrorsely convolute ; 

 stamens included and inserted in the constriction of the tube ; anthers cohering in a 

 cone : the rest as in R. Fohlii. 



7. Rhabdadenia nertosa, nob. : Apocynum nervosum, Miller, Diet. (1768) n. 9 : Echites {Laubertia) 

 paludosa, Griseb. (non Vahl) in Ploi". Brit. W. Ind. p. 415. In Antillis at America tropicali, sec. 

 Griseb. in Cat. PI. Cub. C. Wright, 33 (Wright 2954) ; in Reyis. ejusd. Cat. 1885 (C. Wright 

 2954) : V. s. in herb. Mus. Brit. Carthagena (specim. typ. ea? herb. Miller). 



This is evidently the same species, with oval mucronulate leaves, described by Grise- 

 bach as the " Echites paludosa, Vahl," a blunder scarcely exceeded by any of the several 

 errors of the former author in his enumeration of the apocyneous plants of the Antilles. 

 It is difficult to understand how so glaring a mistake could have been made ; for Vahl's 

 excellent description and drawing are so precise, that no botanist ought to have erred on 

 tbe subject. 



Apparently an erect shrubj with subscandent branches, the axils being lf-2 in. apart ; 

 the opposite leaves are ovate-obldng, obtuse (often oblique) at the base, broadly 

 rounded at the summit, frequently emarginated, always suddenly mucronulate, thinly 

 chartaceous, with scarcely revolute margins, very opake above, subferruginous, sulcated 

 along the midrib, with very slender immersed nerves, bpake and darkly ochraceous 

 beneath, with blackish nerves scarcely prominulent, 1|-3J in. long, f-lf in. broad, on 

 slender, straight, channelled petioles 4-9 lines long; raceme terminal, on a peduncle 

 3-4) in. long, bearing about 5 alternate flowers on slender pedicels 4-6 lines long, each 

 with a slender linear basal bracteole ; sepals linear-oblong, with parallel nerves, 2-2 J lines 

 long, \ line broad ; a handsome yellow corolla ; tube If in. long, narrowed cylindri- 

 cally at its base for 9 lines, funnel-shaped above ; segments dolabriform, 9 lines long : 

 the rest as in B. Fohlii. 



8. Rhabdadenia cordata, nob. : Apocynum cordatum. Miller, Diet. (1768) n. 10 ; Houston, Icon. n. 8, 

 pi. 44. fig. 5, 10 et 11 j A. DC. I. c. p. 440 : Periploca scandens, Miller, Diet. n. 10. Vera 

 Cruz : V. s. in herb. Mus. Brit, (specim. in hort. MiUeri cult, ex pi. ab Houstonio introdueta) in 

 fructu. 



The above specimen undoubtedly belongs to Bhabdadenia. The slender subscandent 

 pale brown branch has its axils 2J in. apart ; the leaves are oblong, roundish and obso- 

 letely cordate at the base, rounded and mucronulate at the apex, entire, with sub- 

 revolute margins, dark green above, with immersed nerves, yellowish opake beneath, 

 with scarcely prominulent nerves, 2| in. long, 1 in. broad, on slender petioles 4 lines 

 long ; inflorescence axillary, with a terete peduncle half as long as the leaves, bearing 



