414 University of California Publications in Botany [Vol. 10 



Vincetoxicum? tortum sp. nov. 



Volubile : caulibiis paiilulum hirsutis : f oliis glabris, superioribus 

 alternantibus, inferioribus oppositis latioribus, ovato-aciiminatis basi 

 profunde cordatis, usque ad 11 em. longis, 8 cm. latis; petiolis jrlabris, 

 ca. 4.5 cm. longis: cymis axillaribiLS, laxe florentibus; pedunculis 

 glabris 3-5 cm. longis ca. 6-floris; pedicellis 0.5-1 cm. longis: corolla 

 alabastro ut videtur siecata flavida, valde contorta, deinde explanata 

 fuscaque : sepalis ca. 1 mm. longis, ovato-lanceolatis intus glandulis 

 paucis praeditis; corolla fere usque ad basim 5-lobata, lobis anguste 

 lineari-lanceolatis, margine hirsuto-ciliatus, ca. 1.5 cm. longis ; corona 

 basi columnae affixa, 5-lobata, intus hirsuta, columnae brevi aequali ; 

 stigmate vertice depresso apiculo nullo ; pollinio in quoque loculo 

 solitario, horizontali. Folliculi non suppetunt. 



This plant is a vigorous climber. The lower opposite leaves are 

 much broader and less acuminate than the alternate upper ones. The 

 column is very short, so the anthers and stigma appear to be sessile. 

 The gynostegium seems to be that of Gonololms as given by Bentham 

 and Hooker, but the long, conical, contorted bud of the corolla, and 

 the alternate leaves are peculiar. Collected at Santa Lucrecia, Vera 

 Cruz. No. 9012. Type, Herb. Univ. Calif. No. 220312. 



Vincetoxicum propinquum sp. nov. 



Volubile : caulibus dense retrorsum pubescentibus : foliis ovato- 

 acuminatis basi cordatis sinu ca. 3 mm. lato, supra paulo breviter 

 pubescentibus, subtus pubescentibus ca. 5 cm. longis, 2.7 cm. latis; 

 petiolis ca. 2 cm, longis, pubescentibus : floribus 1-2-cymosis pedunculo 

 ca. 1 cm. longo pubescenti plerumque flores 2 gerenti ; jjedicellis ca. 

 3 cm. longis, pubescentibus ; calyce profunde lobato lobis ovato- 

 aeuminatis ca. 7 mm. longis, breviter ciliatis extus pubescentibus; 

 corollae tubo ca. 3 mm. longo ; corona duplici, exterior! annulata lobata 

 pubescenti prope basim corollae affixa, interiori crassa rugosa glabra; 

 columna ca. 2.5 mm. longa ; stigmate vertice depresso valde angulato. 



This is near Gonololus unifforus H. B. K. but differs from the 

 description in having retrorsely pubescent stems, a double corona, and 

 other minor characters. Collected on mountains near Hacienda Mon- 

 serrate, Chiapas, No. 9079. Type, Herb. Univ. Calif. No. 220312. 



Ditassa mexicana sp. nov, 



Caulibus glabris: foliis oblongo-ovatis acuminatis, supra venis 

 prominentibus utrinquesecus ca, 12, glabris usque ad 4 cm. longis, 

 1.7 em. latis; petiolis ca, 5 mm, longis: umbellis axillaribus 4— 8-floris; 

 pedunculis brevibus breviter multibracteatis; pedicellis 2-4 cm. longis: 

 calyce 5-fido lobis ovatis; corolla 3.5 mm. longa quam calyce triplo 

 longiori profunde 5-loba ; lobis oblongis aeutis prope margines breviter 

 albo-pubescentibus ; columna brevi; stigmate vertice convexo; corona 



