ON SOUTH-AMERICAN APOCYNACE^. 117 



of 5 expanded obKquely ovate segments, somewliat shorter than the tube, glabrous ; 

 disk of B erect lobes as long as the 2 ovaries ; 2 straight erect follicles, 10 in. long, 

 3f lines broad ; seeds scarcely observed. These characters are quite analogous to those 

 of Mytropus ptarmica, differing in an inflorescence of 8 instead of 2 pedicellate 

 flowers. 



Eriadenia *. 



A peculiar genus, founded upon an erect shrub with opposite leaves, marked by 

 immersed closely parallel nerves, as in Nerium and Sancornia. In habit and inflores- 

 cence it resembles JRhodocalyx, having rufescent sepals with parallel nerves, a long 

 tubular corolla, its segments similarly contorse, sagittate anthers, a disk of 5 free 

 fleshy lobes, a style with a similar clavuncle, follicles of the same shape and size; 

 but it differs in many essential particulars, especially in the want of an apical coma in 

 the seeds. 



Eriadenia, nob. Sepala 5, ovata, parallele nervosa, extus pilosa, singula squama lata ciliata 2-3-lacinu- 

 lata intus munita. Corolla hypocrateriformis, tubo anguste cylindrico, longo, recto, utrinque 

 glabro, intus pauUo infra faucem glandulis 5 breviter oblongis donate, limbi segmentis 5, glan- 

 dulis altemis, insequilateris, trapezoideo-linearibus, tubo sequilongis, intus horizontaliter plicatis 

 et dextrorsum convolutis. Stamina 5, pauUissime supra basin tubi inserta, subsessilia; antherce 

 lineares, sagittatee, apice longe cuspidatse, imo tenuiter parallele 2-furcat8e, medio extus puberulse^ 

 intus anguste 2-loeulares. Discus 5-lobus, lobis liberis, erectis, ovatis, extus brevissime pUosis, 

 margine crebre cUiatis. Ovaria 2, ovata, disco aequilonga, puberula. Stylus brevissimus, subvalidus, 

 striatus, 2-sulcatus, apice clavuncula conica 10-siilcata imo 5-dentatim expansa incrassato; stiff- 

 mata 2, acute linearia, foliacea, erecta. Folliculi 2, tereti-cylindrici, subcurvati, subtorulosi; 

 semina pauca, compressissima, lineari-oblonga, apice rostrata, subimbricata, hilo parvo centrali 

 peltatim aflBxa, pilis rufulis rigidis densissime patentim villosa. 



Prutex Peruvianus ; folia opposita, ovata, patentissime et parallele nervosa, petiolata ; inflorescentia 

 extraaxillaris , racemosa ; pedicelli alterni, bracfeolati ; flores majusculi, rubri. 



Eriadenia obovata, nob. : ramulis subfistulosis, erectis, angulato-sulcatis, epidermide tenui laxa striata : 



foliis oppositis, cuneato-obovatis, apice rotuudatis, et in acumen mucroniforme obtusum repente 



constrictis, coriaceis, marginibus integris revolutis, supra profunde viridibus, subnitentibus, nervis 



patentissimia crebre parallelis utrinque omnino immersis, costa sulcata, subtus flavide opacis, 



costa prominente ; petiolo canaliculato, quam limbus 8plo breviore : racemo laterali ; pedunculo 



foliis dimidio breviore ; pedicellis circa 8, altemis, imo bracteolatis, calyce 3plo longioribus ; sepalis 



brevibus, obtuse oblongis, extus puberulis, marginibus glabris et membranaceis ; corolla hypocrateri- 



formij tubo longe cylindrico; segmentis 5, imo trapezoideis, medio mucronatis, dein lineari- 



expansis, tubo subsequilongis, rubris : cset. ut in char, generico. In Peruvia alta : v. s. in herb, meo 



et alior. Tarapota (Spruce 4303) . 



Its straight branchlets have axils 1 in. apart ; the leaves are 2J-3 in. long, Ij-l^ in. 



broad, on rather slender petioles 4 lines long, united transversely by a line on each side; 



the peduncle is about IJ in. long, bearing about 8 or 10 alternate flowers on pedicels 



5 lines long, each with an acute ovate bract two thirds of its length; the sepals are 



2 lines long; the tube of the corolla 12 lines long, 1\ line broad; segments, 11 lines 



* Ab ipinv (lana), dSriv (gTandula), from its hairy disk. 



