ROBINSON AND BARTLETT. — PLANTS FROM GUATEMALA AND MEXICO. 67 



floribus in cymas racemosas 15-30-floras axillares terminalesve_ aggre- 

 gatis ; cymarum bracteis perparvis ovato-deltoideis albidis ; pedunculis 

 3-8 mm. longis ; pedicellis 5 mm. loiigis breviter supra basin articu- 

 latis ; sepalis ca. 1.6 mm. longis puberulis subaequalibus ; petalis 

 glabris in fructu persistentibus, duobus posticis ovatis apice truncatis 

 2.4 mm. longis, duobus intermediis aequilongis subquadratis breviter 

 apiculatis ad basin antrorsum brevi-auriculatis, antico 1.9 mm. longo 

 trinervio inter mediam apicemque constricto, parte inferiore (ungue) 

 ampulliformi, parte superiore (limbo) multo parviore suborbiculari 

 apice bilobata ; staminibus 2 mm. longis inter antheras connatis tubum 

 formantibus, tribus posticis triangulo-appendiculatis, filamentis per- 

 brevibus liberis, duobus anticis appendicibus connatis, filamentis extus 

 ad basin glandulae late scutiformi adnatis, glandula gibbositati petali 

 antici conformali, loculis duobus contiguis antberarum anticarum 

 abortivis ; stylo corolla paululo longiore ; capsula glabra viridi 6 mm. 

 diametro 9 mm. longa. — Gualan, Department of Zacapa, Guatemala, 

 19 January, 1905, C. C Deam, no. 385 (type, in hb. Gray). A species 

 well marked by the combination of alternate leaves, numerous cymose 

 axillary inflorescences, and short lower petal. In general structure it 

 is most closely allied to such South American species as lonidium 

 atropurpureum St. Hil. and /. Sprucei Eichl. 



Ipomoea anisomeres Robinson & Bartlett, n. sp., volubilis ; caule 

 gracili lignescenti glabro subtereti 3-6 m. longitudine a cortice brun- 

 nescenti-griseo obtecto aetate papilloso-scabrato ; foliis ovatis integris 

 profunde sinu patenti cordatis acutiusculis vel subattenuatis et in 

 apice emarginato cum nervo excurrenti apiculatis penninerviis 6-11 

 cm. longis 4-7 cm. latis utrinque glabris subtus pallidioribus ; petiolo 

 gracili glabro 3-5 cm. longo ; pedunculis axillaribus solitariis 3.5-6 cm. 

 longis in summa parte composite cymoso-ramosis ; pedicellis 1.5-2 cm. 

 longis modicegracilibus sursum plus minusve incrassatis glabris ; sepali . 

 glabris margine albis 2 exterioribus 1-3 mm. longis suborbicularibus 

 obtusisvix herbaceis 3 interioribus 1 cm. longis ellipticis apice rotundatis ; 

 corolla late infundibuliformi alba vel praesertim in faucibus purpuras- 

 centi 6.5-7 cm. longa, limbo 4-5 cm. lato subintegro, faucibus 1 cm. 

 diametro 3.5 cm. longis cylindratis deorsum in tubum brevem (ca. 1 

 cm. longum) proprium angustatis ; capsula ovoidea acuta 10-12 mm. 

 longa glabra biloculari ; seminibus 4 griseo-fuscis breviter pubescenti- 

 bus. — Gualan, Department of Zacapa, Guatemala, 12-14 January, 1905, 

 C. C. Beam, nos. 318 and 319 (types, in hb. Gray). This species appears 

 to fall into § Inaequlsepalae, as defined by Peter in Engl. & Prantl, Nat. 

 Pflanzenf. iv. Ab. 3, 29. The specific name alludes to the strikingly 

 unequal sepals. 



