APOCYNACEAE. 



Determined by Camillo Schneider. 



MELODINUS Forst. 



Melodinus Hemsleyanus Diels in Bot. Jahrb. XXIX. 539 (1900). 

 Melodinus? sp. nov. Hemsley in Jour. Linn. Soc. XXVI. 94 (1889). 



Eastern Szech'uan: Taning Hsien, alt. 650 m., July 1910 (No. 

 4563; climber over rocks, 1.5-3 m. long, flowers white); Mt. Omei, 

 July 1904 (Veitch Exped. No. 5070; climber). SouthernSzech'uan: 

 "Nanch'uan, 'Kung chia p'ing,' Felswande, August," A. von Rost- 

 horn (No. 511, type). 



This species may be distinguished by the small and sometimes indistinct scales 

 at the mouth of the corolla. It is closely related to the following species. 



Here may be added the description of another species not collected during the 

 Arnold Arboretum Expeditions. 



Melodinus Seguini L^veill^ in Fedde, Rep. Spec. Nov. II. 114 (descriptio satis 

 incorrecta) (1906), fide specim. originalis; Fl. Kouy-Tcheou, 30 (1914). 



Frutex ad 1 m. altu8;ramuli homotini distincte, annotini laxius breviter villosuli 

 V. fere tomentosi, cinereo-brunnescentes. Folia subcoriacea, ovato-oblonga v. 

 elliptico-oblonga, basi rotundata, brevissime acutata, apicem versus sensim v. 

 abruptius acuminata, integra, 5-11 cm. longa, 2.5-5.5 cm. lata, supra viridia, lucida, 

 in nervis et costa impressa densius, in facie sparse griseo-villosula, subtus pallidiora, 

 molliter pubescenti-villosula, nervis lateralibus utrinsecus circiter 10 patentibus 

 paulo prominulis costa distincte prominente; petioli supeme sulcati, dense breviter 

 villosuh, 6-8 mm. longi. Inflorescentia pro sectione normalis, axibus calycibus 

 alabastris modo ramulorum pilosis ; pedicelli versus apicem bracteolis 2 ovato-lanceo- 

 latis instructi, 1-1.3 m. longi; calycis segmenta ovato-lanceolata, acuta, subhbera, 

 subimbricata, plus minusve appressa, circiter 6 mm. longa; corolla alba, pro genera 

 normalis; tubus extus breviter tomentellus, circiter 1.6-1.9 cm. longus, 1.5 mm. 

 crassus, sub faucem paulo angustatus, intus sparse puberulus; lobi circiter 1.4 cm. 

 longi et 5-6 mm. lati, oblanceolati, obtusi, margine interiore paulo supra basim 

 plus minusve irregulariter cristato-undulato, extus in partibus in alabastro non in- 

 flatis nudi, intus glabri v. sub microscopio minime puberuli, ad faucem lobulis Uneari- 

 bus puberuUs circiter 2 mm. longis paracorollam irregularem formantibus instructi; 

 stamina 5 versus basim tubo inserta gynaeceumque glabra, pro genere normalia; 

 stigmata apice breviter bifida; stylus calycem subaequans; fructus ignoti. 



Kweichou: "cascade de Hoangko-Chou sur les rochers, 9 juin 1898," J. Se- 

 guin (No. 2390, type). Kwangsi: Lungchou, H. B. Morse (No. 171 — shrub 

 1 m. tall, flowers white; ex collectione A. Henry). 



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