ON SOUTH-AMERICAN APOCYNACEiE. 161 



acutely lanceolate, submembranaceouSj reddish, glabrous, 5 lines long, curving at tbe 

 apex ; tube of corolla 1^ in. long, very narrow, and scarlet for the length of 8 lines, then 

 swelling into a cylindrical bell-shape, whitish, with red stripes, subplicate ; segments of 

 a deep-red chocolate-colour, oblong, with nearly parallel sides, obliquely truncate at the 

 summit, 7 lines long, 3^ lines broad ; stamens seated in the constriction of the tube, 

 springing out of a dense cottony ring ; anthers yellow, with 2 basal, obtuse, parallel prongs. 

 It is a species widely differing from all others. 



6. MicRADENiA Sellowii, nob. : Dipladenia Sellowii, Miill. I. c. p. 128. In Brasilia : prov. Minas 



Greraes (Riedel 1448), Itacolumi (Riedel 2768) : non vidi. 



A slender species, with small narrow leaves like those of Jf. atroviolacea : the branches 

 are long, slender, and flexuous, with glands in the axils between the petioles ; the leaves 

 are oblong-elHptic, obtusely acute at both ends, subcoriaceous, with revolute margins, of 

 a dark reddish green. If- 2 J in. long, 7-9J lines broad ; raceme subterminal, longer than 

 the leaves, bearing 3-6 large flowers like those of M. Martiana; tube of corolla purple, 

 with rosy-red segments. 



7. MicRADENiA UROPHYLLA, nob. : Dipladenia urophylla, Hook. Bot. Mag. tab. 4414; Miill. I. c. p. 131. 



In Brasilia -.v. v.ia. montib. Organ. ; v. s. in herb. Mus. Brit, ex eodem loco (Gardner 5817). 



A climbing species, collected by me in 1828 at an elevation of 3500 feet ; Gardner found 

 it in the same locality in 1841. The cultivated plant was received in 1848 from Mr. 

 Veitch's collector, probably from the same locality. Its flexuous branches are pale brown, 

 subangular, striate, fistulous, glabrous, IJ line thick; the axils subdilated, 1^-2^ in. 

 apart, are charged at the nodes on each face with about 6 subulate fleshy glands 1-2 lines 

 long ; the opposite leaves are oblong (in Gardner's specimen more ovate), rounded and 

 plicate at the base, suddenly constricted at the apex into an obtuse narrow, caudate 

 acumen, submembranaceous, fuscous green above, opake, sulcate along the midrib and 

 about 10 pairs of diverging nerves and transverse veins, pallid brown beneath, with pro- 

 minulent nerves, 3|-4| in. long, l|-2 in. broad, on slender striolate petioles 6-9 lines 

 long ; racemes solitary and lateral at the nodes, 4 in. long, on a slender, patent or re- 

 curving peduncle 1-j in. long, bearing above about 4 alternate flowers on slender spirally 

 twisted pedicels 9 lines long, each with a linear bracteole 2 lines long ; sepals lanceolate, 

 1^ line long ; tube of corolla If in. lopg, contracted below into a narrow cylindrical form 

 4 lines long, upwards funnel-shaped, and 6 lines broad in the mouth, of a salmon-red 

 colour ; segments oblong-acute, somewhat equilateral, reflexed at the apex, 6 lines long, 

 3 lines broad ; disk of 2 lobes one third the length of the 2 ovaries. 



8. MicRADENiA Martiana, A. DC. I. c. p. 485 : Echites Martiana, Stadelm. Bot. Zeit. 1841, p. 31 : 

 Dipladenia Martiana, Miill. I. c. p. 127 (excl. syn.). In prov. Bahia: non vidi. 



A scandent plant, with flexuous glabrous branches (younger ones hirsutulous), much 

 incrassate at the approximate thickened axils, which present between the petioles 4 ' 

 oblong, subcordate, cuspidate, red, reflexed, warty glands, 1-2^ liuea long ; leaves obovate- 



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