G32 PROCEEDINGS OF THE AMERICAN ACADEMY. 



quoque loculo soiitaria ovoidea pendula. Stigma in rostrum cylindri- 

 cum integrum quam antheras longius productum. Folliculi teretes 

 acuminati tenues laeves. — Herbae perennes volubiles tenues, foliis 

 oppositis parvis linearibus petiolatis ; floribus parvis solitariis vel in 

 cymata pauciflora aggregatis. Genus habitu et squamis coronae siinpli- 

 cibus Metastelmati accedit, sed corollae lobis aestivatione obtegentibus 

 facile distinguendum est. Basistelma squamis coronae simplicibus 

 corollae adnatis et rostro integro nee bifido Meliniae Pattaliadique 2 

 dissimile est: a PattaUade differt etiam lobis corollae reflexis nee 

 rectis patentibusve, appendicibus antherarum magnis rectis vel inter- 

 dum reflexis nee perparvis nee rostro adpressis. Species duae, 

 Basistelma angustifolium (Torr.) n. comb. (JSMastelma angustifolia 

 Ton.) et Basistelma mexicanum (Brandegee) n. comb. (Melinia 

 mexicana Brandegee), Sonorae Sinaloaeque incolae. 



Marsdenia trivirgulata, n. sp., lignosa volubilis, ramis gracilibus 

 juventate griseis aetate griseo-brunneis, in lineis longitudinalibus pu- 

 berulis ; lenticellis magnis conspicuis ; internodiis foliis fere aequilongis. 

 Folia opposita ovato-lanceolata, maxima 5 cm. longa 2 cm. lata, apice 

 basique acuminata, supra viridia sparsim puberula, subtus, praecipue 

 secus nervos, densius puberula, petiolis longitudine plerumque infra 

 1 1 1 mm. Cymata fere sessilia ca. 8-flora, pedicellis 2-3 mm. longis, basi 

 bracteas ovatas minutas gerentibus. Calyx 2 mm. longus infra mediam 

 5-fidus, segmentis late ovatis obtusis, extus puberulus intus sub sinubus 

 glandulis 5 papilliformibus praeditus. Corolla 6 mm. longa usque ad 

 calycis apicem 5-fida sub sinubus callosa et appendicibus perbrevi- 

 bus truncatis emarginatis praedita, segmentis angustis oblongis plus 

 minusve patentibus, lineis tribus rectis longitudinalibus purpureis 

 maculi.sque concoloribus ornatis ; coronae squamis 5 carnosis late ovatis 

 basi connatis, margine liberis, supra sinus in auriculas callosas pro- 

 ductis, infra antherarum loculos columnae brevi adnatis. Antherarum 

 membranae terminales latae apice truncatae erosae mucronatae rostro 

 adpressae. Pollinia erecta oblonga 0.4 mm. longa corpusculo virguli- 

 formi paululo breviora. Stigmatis rostrum conicum 1.8 mm. longum, 

 apice leviter bidentatum. Folliculi ignoti. — Iguala Canon, State of 

 Guerrero, Pringk, no. 10,333 (type, in hb. Gray). In flower 13 October 

 1 91 16. A species well marked by its small, thin leaves, attenuate at the 

 base. 



Cordia igualensis, n. sp., sectionis Gerascanthi arbor. Hamuli grisei 

 ca. 4 mm. crassi, aetate glabri, juventate puberuli, cicatricibus foliorum 



animation of the type material has shown that in Pattalias Palmeri 

 the rostrum is distinctly bifid, and not entire, as stated in the original charac- 

 terization of the genus. 



