148 ON SOUTH-AMERICAN APOCYNACEJE. 
on a peduncle 10 lines long, all ferruginously pilose; bracts acutely and broadly ovate, 
5 lines long; pedicels 6 lines long; sepals broadly ovate, 5} lines long, hirsutulous on 
both sides; corolla 10-12 lines long, sericeously villous outside; tube ¿ of that length; 
appendages linear, lanceolate, obtuse, densely papillous, and with the stamens partly 
exserted; disk urceolate, crenately 5-lobed on the margin, as long as the ovary. 
12. Prestonta CEARENSIS, nob.: volubilis, ramis subtenuibus, luteo-pubescentibus : foliis oblongis, imo 
rotundatis et subcordatis, superne sensim acute acuminatis, tenuiter chartaceis, marginibus revolutis 
et subcrenulatis, supra pallide viridibus, subglabris, ad nervos immersos sulcatis et flavide puberulis, 
subtus ferrugineo-puberulis, nervis venisque reticulatis densius flavide hirsutulis : inflorescentia 
laterali capitata, pubescente ; pedunculo reflexo; floribus congestis, pedicellatis ; sepalis acute 
oblongis, tubo corolle brevioribus, extus hirsutis, intus squama lata lineari extus hirsuta munitis. 
In Brasilia, prov. Ceará: v. s. in herb. Mus. Brit. Crato (Gardner sine numero). 
Axils 5 in. apart; leaves 3-52 in. long, 1-21 in. broad, on pubescent petioles 2 lines 
long; reflexed peduncle 6 lines long, bearing a capitate head of flowers 12 in. in diameter; 
pedicels 4 lines long; sepals 5 lines long ; tube of corolla 7 lines long; segments 4 lines 
long; stamens inserted in the middle of the tube on a pilose ring; cohering, acuminate ; 
anthers and appendages semiexserted. 
13. PrestonIA MOLLIS, H. B. K. iii. 221, tab. 242: Hemadictyon molle, A. DC. l. c. p. 497. In Peruvia, 
prov. S. Juan de Bracamoras : v. s. in herb. meo Chachapoyas (Mathews). 
Mathews's specimen agrees with Kunth’s drawing. It is a climbing plant, with very 
slender tortuous subangular branches, with axils 31—4 in. apart, and having a transverse 
ridge, with about 4 pectinated small stipules on each face; leaves oblong-elliptic, obtuse 
or subtruncated at the base, and with a short suddenly acute acumen, pale green above, 
subseabridulous, somewhat trinerved at the base, with other 5 pairs of fine divaricated 
nerves, whieh are scabridly pilose, paler, yellowish, opake beneath, scabridly puberulous, 
especially on the midrib and nerves, 2-3 in. long, 3-11 in. broad, on scabridulous petioles 
3-6 lines long; corymb solitary and lateral at the nodes, 24 in. long, on a bare slender 
peduncle rising out of the pectinated ring, 1 in. long, 2-3fid above, and bearing a con- 
gested head of flowers on slender pedicels 4—6 lines long, each with an acute linear mem- 
branaceous bract 4 lines long; sepals acutely oblong, very membranaceous, reticulated, 
subimbricate, 6 lines long, 1} line broad, each with a small inner triangular scale; tube 
of corolla a little swollen at the base, much contracted in the middle, of thin texture, 
glabrous, 10 lines long, with an almost obsolete disjointed ring in the mouth, and below 
it 5 spathulate-linear appendages semiexserted; segments falcately oblong, subacute, 
8 lines long; stamens inserted in a pilose ring in the middle of the tube, on slender fila- 
ments; anthers acuminate, with 2 long, sharp, subdivaricated prongs, the summits 
partly exserted; disk of 5 small, rounded, fleshy lobes, half-connate at the base, as long 
as the ovary. 
Kunth was wrong in describing the lobes of the disk as distinct from the base, and 
the ovary as divided: he was in error in figuring a thick ring in the mouth of the 
corolla. 
