200 ME. SPEUCE ON FIVE NEW PLANTS TEOM EASTEEN PEEU. 



It should be mentioned that the name " Yangua" is given also 

 to two species of Indigofera, cultivated sparingly at Tarapoto: 

 they are sometimes called " Tacsha-yangua" (or " small Tangua"), 

 to distinguish them from Tcmgua tmctoria, which is the " Atun- 

 (or great) yangua." 



IV. Ckstro^k, a new genus of'RiJ'RiA.cisiM. Tribe, Cinchone^. 



Char. Gen. — Calyx obparabolicus, compressulus, inferne cum ovario 

 connatus, dimidio superiore liber, ore obtuse 5-6-dentato ; florum 

 axillarium dente externo plerumque in laminam phylloideam producto. 

 Corolla e basi angusta tubulosa, eampanulata, subgibba, 15-18-sulcata, 

 5-6-lobata; lobis cordato-ovatis imbricatis, 3 (vel omnibus) demum 

 reflexis, quasi bilabiata. Stamina 5 (rare 6) corolla duple breviora; 

 filamenta basi in tubulum corollae tubo adnatum coalita, dein libera 

 anthercB lineares, connectivo adnatae, 2-loculares, longitudinaliter de- 

 hiscentes. Ovarium inferum, biloculare. Ovula 00 in placentis elon- 

 gatis, sectione reniformibus, dissepiment© utrinque insertis, sessilia, 

 anatropa. Stylus brevis cum stigmate lineari bilamellato tubum 

 stamineum paullo superans. Capsula anguste obovata, calycis limbo 

 coronata, ab apice ad basin septicido-bivalvis. Semina 00, parva, tenuia, 

 ala trapeziformi vel triangulari basi ssepius biloba cincta. Embryo in 

 axi albuminis camosi orthotropus ; cotyledonihus parvis ovalibus sub- 

 planis ; radiculd tereti hilo proxima. — Arbor Peruviana cortice casta- 

 neo deciduo, stipulis intrapetiolaribus, floribus magnis Bignonioideis, 

 Calycophyllo proxima ; huic tamen sunt flores multo minores, corolla 

 brevi-campanulata symmetrica omnino esulcata, lobis concavis fere 

 fornicatis nunquam reflexis, et filamenta corolla cequilonga cum eddem 

 ad loborum basin usque concreta, Tiaud in tubulum coalita. 



Capirona decorttcans. Spruce, 



Hab. Tarapoto et aliis locis secus fl. Huallaga, in sylvis primaevis recenti- 

 oribusque, solo arenoso. Capirona Peruvianorum dicta est. 



Arbor pulchra 30-40-pedalis, apice parce patule ramosa ; ramulis sub- 

 teretibus; cortice castaneo, Isevissirao, nitente, lamellis tenuissimis 

 secedente. Folia opposita, in petiolo perbrevi 5-lineari, maxima 

 20 X 10 unc, oblongo-ovalia, apice rotundata vel apiculo brevissimo 

 obtusato terminata, subcoriacea, glaberrima vel in stirpe juniore ad 

 venas et in facie inferiore plus minus pubescentia; venis vaUdis pa- 

 rallelis, angulum 70° cum costa eflformantibus, secus marginem cur- 

 vatis et anastomosantibus. Stipules intrapetiolares, 36 lin. longae, 13 

 lin. latse, elongato-triangulari-lingulatae, acutae, 2-costatae, venulosae, 

 albidae, submembranacese, basi subcordata sese imbricantes. Cymi 

 ex stipularum superiorum plerumque aphyllarum axillis, subinde 

 paniculam magnam terminalem efformantes ; pedunculo 9-unciali v. 

 breviori, apice 3-fido ; ramis bis terve bifidis, bracteola stipulari ad 

 cujusque rami basin. Flores ad ramorum apices axillasque sohtarii. 



