ON SOUTH-AMERICAN APOCYNACEJE. 25 



2 in. long, 9 lines broad, on petioles 4 lines long: the panicle is 5 lines long, the 

 peduncle 1 line, the pedicels J line, the lanceolate sepals ^ line, the corolla 2 lines long, 

 its obtuse oblong segments ^ length of tube, all cano-tomentose ; buccal scales and 

 anthers as in the preceding species ; style terminated by a large oblong gland and 2 small 

 stigmata : the follicle very much flattened, acute at the summit, narrowing below, is 

 1^ in. long, 5 lines broad, ^ line thick ; the seeds, subtomentose, slightly imbricating, with 

 the winged moiety poiating downwards, are 12 lines long, 3 J lines broad ; the superior 

 embryoniferous scutcheon, 4 lines long, has the funicle attached in its centre, in a 

 horizontal direction, 2 lines long, emanating from the placentiferous margins of the 

 follicle, as in the preceding ; owing to the abortion of the lower ovules, all the seeds have 

 a superior scutcheon. 



6. Thyroma bicoloRj nob. : Aspidosperma bicolor, Mart. Nov. Gen. i. p. 60 ; A. DC. I. c. p. 397 ; 



Miill. I. c. p. 54. In Piauhy (reora vidi). 



A species with squarrose branches and a solid bark ; leaves obovate, roundly obtuse at 

 the summit, rather acute at the base, glabrous above, cinereo-tomentose beneath, with 

 about 10 pairs of nerves, with others shorter and intermediate, subreticulate ; cymes 

 short, sparsely cano-pubescent, sepals ovate, subacute, pubescent; follicles obliquely 

 oblong, obtuse at the apex, with the dorsal margin in the axis straight and mucronulated. 

 If in. long, 6^-7 lines broad ; seeds ovoid oblong, with an eccentric scutcheon wherein 

 the hilum is placed at \ the length of the seed from the scutal extremity, with a 

 narrow wing, — characters answering to Thyroma. 



7. Thyroma Lhotzkiana, nob. : Aspidosperma Lhotzhianum, Miill. I. c. p. 60. In prov. Minas Geraes 



(wow vidi). 



A species noted for its very minute flowers, forming a shrub 6-8 feet high ; and Miiller 

 remarks that it resembles no other species of Aspidosperma ; its spreading branches are 

 extremely slender, subflexuous, cinereous ; leaves elliptic, obtuse, or obtusely rounded at 

 the summit, subacute at the base, glabrous above, with about 12 pairs of slender nerves, 

 with others short and intermediate, very reticulated, glaucous below and obsoletely 

 puberulous, 2^-4 in. long, lf-3^ in. broad, on adpressedly puberulous petioles 2J lines 

 long; cymes lateral, umbelliform, laxly and divaricately branched, puberulous, many- 

 flowered ; pedicels twice as long as the calyx ; sepals obtusely ovate, puberulous, cUiated, 

 f line long ; corolla less than 2 lines long, yellowish green, its tube 1| line long, segments 

 broadly ovate, obtuse, the margins inflected ; ovaries glabrous. 



8. Thyroma parvifolia, nob. : Aspidosperma parvifolium, A. DC. I. c. p. 398 ; Miill. I. c. p. 57, tab. 17. 



In prov. S. Paulo {non vidi). 



A tall tree, much branched, young branchlets covered with a deep-red tomentum ; 

 leaves lanceolate, spathulate, obtuse, gradually narrowed towards the petiole, fuscous 

 above, glabrous, or very tomentous beneath in the younger ones, with 8-10 pairs of 

 horizontally spreading red nerves, 2f in. long, 6-7^ lines broad, on petioles 1 line long ; 

 cyme lateral, about as long as the leaves, on a peduncle 3-4 lines long, shortly and 



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