632 PROCEEDINGS OF THE AMERICAN ACADEMY. 
quoque loculo solitaria 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 simpli- 
cibus Metastelmati accedit, sed corollae lobis aestivatione obtegentibus 
facile distinguendum est. Basistelma squamis coronae simplicibus 
corollae adnatis et rostro integro nec bifide Meliniae Pattaliadique® 
dissimile est: a Pattaliade differt etiam lobis corollae reflexis nee 
rectis patentibusve, appendicibus antherarum magnis rectis vel: inter- 
dum reflexis nec perparvis nec rostro adpressis. Species duae, 
Basistelma angustifolium (Torr.) n. comb. (Metastelma angustifolia 
Torr.) et Basistelma mexicanum (Brandegee) n. comb. (Melinia 
mexicana Brandegee), Sonorae Sinaloaeque: incolae. fs 
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 
mm. Cymata fere sessilia ca. 8-flora, pedicellis 2-3 mm. longis, t 
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 purpurels 
maculisque concoloribus ornatis ; coronae squamis 5 carnosis late ovat 
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 TOSt" 
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 Cafion, State ° 
Guerrero, Pringle, no. 10,333 (type, in hb. Gray). In flower 13 October 
= A species well marked by its small, thin leaves, attenuate at the 
Cordia igualensis, n. sp., sectionis Gerascanthi arbor. Ramuli grise! 
ca. 4 mm. crassi, aetate glabri, juventate puberuli, cicatricibus foliorum 
i ic a aa ra wine Oe mcr 
2 
Examination of the type material has shown that in Pattalias ae 
the rostrum is distinctly bifid, and not entire, as stated in the original ¢ 
terization of the genus, 
" 
. 
4 
a 
: 
