ON SOUTH-AMEEICAN APOCTNACE^. 146 



fulvo-tomentous above on the nerves and margins, of a different size, and on longer 

 petioles ; the pedicels are longer, as are also the sepals, and as long as the tube of the 

 corolla ; the calycine scales are bidentate : these are conditions sufficiently different 

 from the typical specimen. 



A drawing of this plant, and an analysis of its flower, fruit, and seeds, are shown in 

 Plate XX. B. 



2. Peestonia latifoliAj Benth. in Hook. Journ. Bot. ill. 250 ; A. DC. I. c. p. 429 ; Deless. Icon. v. 22, 



tab. 51 ; Miill. I. c. p. 167. In Guiana : v. s. in herb, meo et alior. Pirara (Schomb. 755). 



A olunbing shrub, with branches 2 lines thick, covered with dense yellow woolly 

 tomentum, the axils 6 in. apart, being traversed between the petioles by an arching rib, 

 furnished with several small toothlike hairy stipules ; leaves ovate, navicularly plicate, 

 recurved, and subcordate at the base, roundish at the summit, with a short, abrupt, often 

 recurved acumen, opake-green above, scabridulous, shortly and softly pubescent, hirsutu- 

 lous on the yellow slender nerves, beneath covered with dense yellowish tomentum, the 

 midrib, stoutish nerves, and transverse veins of a reddish hue, 3|^-5 in. long, 2-3 in. 

 broad, on thick pubescent petioles 2-2^ lines long. The peduncle of the tomentous 

 corymb is stout, reflected, 1 in. long, issuing from one side of the node between the 

 stipules upon the transverse ridge, and bearing a capitate head of many flowers, IJ in. 

 in diameter ; sometimes it happens that many of the flowers disappear, giving it the 

 appearance of a few-flowered raceme ; the thick pedicels are 1 Hne long, supported by 

 tomentous acutely linear bracts 3 lines long ; the sepals acutely oblong, are hairy on 

 both sides, 5 lines long, 2 lines broad, each with an inner broad pluridentate scale ; the 

 tube of the corolla is cylindrical, stout, pilose, 7 lines long, with 5 semiexserted linear 

 appendages ; segments inequilateral, oblong, acute on one angle, 4 lines long, 2^ lines 

 broad, hairy outside; stamens inserted in the middle of the tube, with subcohering 

 anthers shortly exserted at the apex ; disk urceolate, its margin split into 5 short crenate 

 lobes, somewhat longer than the ovary. 



3. Prestonia ipom^ifolia, a. DC. I. c. p. 429. In Cayenne : non vidi. 



A species scarcely differing from the preceding; leaves ovate, rounded at the base, 

 abruptly cuspidate, pilose above, hispidly rufo-tomentous beneath, with more patent 

 nerves, 4-6 in. long, 2-3 in. broad, on petioles 2-3 lines long ; inflorescence capitate, rufo- 

 tomentous; sepals pilose on both sides, 5 lines long; tube of coroUa 6 lines long; disk 

 urceolate, twice as long as the ovary, with crenulate lobes. 



4. Pkestonia glabrata, H. B. K. iii. 222: Hcemadictyon glabratum, A. DC. Prodr. viii. 427. In 



America centrali, ad Guayaquil (Bonpland) : v. s. in herb. Mm. Brit. Panama (Seemann 1062) . 



The above specimen, referred by Seemann in his Botany of the Herald p. 168, to the 

 Brazilian type P. tomentosa, B. Br., is certainly very different. He there seems to have 

 overlooked the plant in his collection which is here described as P. Seemanni. P. glabrata 

 is a climbing species, with pale brown glabrous branches, with axils about 5 in. apart ; 

 leaves obovate-oblong, broader below the middle, narrower towards the base, which is 



u 



