ON SOtTTH-AMEEICAN APOCYNACE^. 91 



14. MAiiOtJETiA NiTiDA, Spruce ; Miiller, I. c. p. 94. In Amazonas : v. s. in herb, variis Barra do Rio 

 Negro (Spruce 1672) . 



A species differing in appearance from all others. Its branchlets are brown, 2J lines 

 thick, with many prominent yellow lenticels, and with axils 3^ in. apart ; leaves oblong, 

 subacute, and channelled at the base, narrowing gradually upwards and suddenly ter- 

 minating in a linear acumen J in. long, stifi&y chartaceous, margins subrevolute, pale 

 green, opake, and rugulous above, yellowish immersed midrib and nerves (about 8 pairs), 

 somewhat paler beneath, opake, rugulous, with prominent midrib and subprominulent 

 fine nerves, veins scarcely visible, 4^6 in. long, lf-2^ in. broad, on channelled petioles 

 2^ lines long ; inflorescence solitary in each axil ; peduncle bracteolated, 1 line long, 

 supporting 10-12 subfasciculate flowers ; pedicels glabrous, 6 lines long ; sepals 1 Mne 

 long, lanceolate ; tube of corolla narrow, contracted in the middle ; segments lanceolate, 

 5 lines long, subpuberulous within at their base, with dextrorse convolution. 



15. Malouetia furfuracea, Spruce; Miill. I. c. p. 93. In Brasilia: v. s. in herb, variis Barra do B,io 

 Negro (Spruce 1566), San Gabriel, Rio Negro (Spruce 2305). 



Its branchlets are somewhat slender, black, striate, dichotomous, with axils 2 in. 

 apart ; leaves 4-6 in. long, 1^2 in. broad, on petioles 2-4 lines long ; inflorescence in 

 the dichotomies of the branchlets ; peduncle bracteolated, bearing about 6 or 8 fascicu- 

 late flowers; pedicels 8 lines long; sepals lanceolate, 1 line long; tube of corolla 

 4 lines long; linear segments 6 lines long, dextrorsely convolute; 2 terete, smooth, 

 black follicles 12 in. long, 1^ line thick. 



16. Malouetia amplbxicaulis, Miill. I. c. p. 91. In Amazonas : v. s. in hb. meo Panure, Rio Uahupes 



(Spruce 3595). 

 A species distinguished by its very large leaves, which give it much the appearance of 

 a Bhigospira : these are somewhat unequal in the same node, on one side 3^5 in. long, 

 1^2 in. broad, on the other 5^8 in. long, 2^-3^ in. broad, subcordate and subsessile at 

 their base, where they are conjoined by a transverse line, with about 12 pairs of white 

 pubescent nerves, each with a poriferous gland in its axil. A corymb of 6 or 8 flowers 

 fasciculate on short, bracteolated, opposite, extra-axillary nodules, with slender pedi- 

 cels 5 lines long ; the sepals are 1 line long ; the very slender tube of the corolla 8 lines 

 long, a little broader below the mouth, with oblong acute segments dextrorsely con- 

 volute in Eestivation ; stamens partly exserted ; the disk is fleshy, tubular, crenately 

 lobed on the margin, enclosing 2 pilose ovaries. 



17. Malouetia riparia, A. DC. Z. c. p. 380: Tabernamontana riparia, H. B. K. iii. 228. In Nova 



Granada : non vidi. 

 A lactescent tree, 20 feet high, with smooth dichotomous branches ; leaves oblong, 

 narrowly acute at the base, acuminate, with undulate entire margins, membranaceous, 

 with prominent nerves beneath, 4-4^ in. long, 16-19 lines broad, on channelled petioles 

 scarcely 3 lines long, their margins united by a transverse ridge across the nodes ; cymes 

 interpetiolar, opposite, at the nodes, on a dichotomous peduncle, and shorter than the 



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