ON SOUTH-AMERICAN APOCYNACEA. 29 
at irregular alternate intervals, a thick short line extends horizontally, terminating in an 
external hook; between these intervals are a number of very fine cross parallel lines, 
somewhat slanting, seeming like a long continuous spiral transparent cell, winding round 
the axis, giving it a somewhat ladder-like appearance, a structure almost unique*. These 
hairs do not emanate from an apical coronal ring, as in the Echitee, but from numerous 
scabrid points all over the surface of the testa, which bear the hairs, the lower ones 
being very short, gradually lengthening upwards, the upper hairs exceeding the length 
of the seed. The floral characters are founded on the examination of the single 
flower above-mentioned. 
MANOTHRIX, nob.: Flores subparvi: calyx parvus, imo cupularis, margine in lacinias acutas 5-fidus : 
corolla tubularis, extus glabra, tubo imo paullo angustiore, ad medium constricto, intus infra 
constrietionem annulo lato densissime piloso, imo glabro, superne ventricoso, utrinque glabro, 
parallele nervoso, subplicato, segmentis 5, paullo brevioribus, obtuse oblongis, dextrorsum con- 
volutis: stamina ex annulo piloso orta, segmentis alterna ; filamenta compressa, linearia, retrorsum 
pilosa, erecto-conniventia, longitudine antherarum ; anthere angustate, subexserte, in conum 
cohzrentes, corneæ, acuminate, dorso pruinosz, antice paullo sub medium et infra locellos pollini- 
feros glandula puberula munite, et hine ad filamenta affixe, imo in furcas 2 breves obtusas 
vix fissee: ovarium parvum, conice oblongum, pilosum, calyce suffultum, 2-loculare : stylus tenuis, 
stamina attingens, apice valde incrassatus, et viscosus, staminibus adherens ; stigmata 2, breviter 
setacea, terminalia. Fructus capsularis, 2-locularis, conice cylindricus, 2-sulcatus, in sulcis sep- 
ticidus, valvis ad axin centralem dehiscentibus, marginibus introrsum inflexis et placentiferis : 
semina numerosa, hilo ventrali ad placentas affixa, imbricata; testa fusiformis, scabrida, pilis forma 
peculiari vestita, inferioribus brevibus, gradatim longioribus, sub apicem longissimis, erecte sparsis: ` 
embryo in albumine copioso, parvus, cotyledonibus ovatis, radicula 4plo breviore, superne spectante. 
Frutices Brasilienses, ramulis fistulosis, ad axillas plus minusve transversim nodosis: folia oppo- 
sita, elliptica, petiolata: racemi brevissim? pedunculati; peduneulo paucifloro, pedicellis fenuibus 
brevibus. 
1. MANOTHRIX VALIDA, nob.: ramulis crassiusculis, fistulosis, opace brunneis, interrupte striatis, glabris, 
lenticellatis, axillis oppositis, vix nodosis, linea transversali sulcata nexis: foliis ellipticis, imo 
canaliculatim recurvis et acutis, apice in acumen acutum subito constrictis, marginibus subrevolutis, 
glaberrimis, rigidule chartaceis, supra fusco-viridibus, opacis, minutissime granulatis, nervis omnino 
immersis, subtus pallide opacis, rugulosis, enerviis, costa striolata vix prominula; petiolo fusco, 
canaliculato, imo crassiore, limbo l4plo breviore: racemis fructiferis et terminalibus brevibus, 
pedunculo cicatricibus 3-4 notato, unico fructifero persistente: capsula subsessili, subcylindrica, 
2-sulcata, apice attenuata, 2-nodosa; pericarpio sublignoso, opace granuloso, glabro, imo calyce 
aucto suffulto; cseteris ut in char. gen. In Brasilia: v. v. e£ sicc, in hb. meo (n. 2052) in montibus 
Organensibus. j 
I found this species later in the same year than the following one, without flowers : its 
branches are 2-3 lines thick, with axils 2-1 in. apart; the leaves are 34 in. long, 13 in. 
broad, on petioles 3 lines long. "The capsule is terminal on short lateral branchlets, or 
on the main stem, upon a short thiekened peduncle 4 lines long, marked by 3 or 4 
erowded cicatrices of others that have fallen, perhaps prematurely: this capsule is 22 in. 
* Whence the generic name, paros (rarus), 0pi£ (capilla). 
