ROBINSON. — DIAGNOSES OF TROPICAL AMERICAN PHANEROGAMS. 613 



VI. DIAGNOSES AND TRANSFERS OF TROPICAL 

 AMERICAN PHANEROGAMS. 



By B. L. -Robinson 



Antigonon grandiflorum (Bertol.), n. comb. Polygonum grandiflo- 

 rum Bertol. Bologn. Nov. Comm. iv. 412 et Flortia Guatimalensis, 12 

 (1840). Antigonon guatimalense Meisn. in DC. Prod. xiv. 184 (1856). 

 A. guatemalense Hemsl. Biol. Cent. -Am. Bot. iii. 37 (1882). 



Tamonea euphrasiifolia, n. sp., fruticosa ramosissima; ramis 

 flexuosis a cortice flavido-griseo tectis ; ramulis elongatis foliatis 4- 

 gonis striatis griseo-puberulis ; foliis subdeltoideo-ovatis flabelliformi- 

 nervatis brevibus 4-6 mm. solum longis aequilatis quam internodia 

 plerumque brevioribus argute dentatis breviter petiolatis supra glabris 

 rugosis viridibus subtus praecipue in nerviis puberulis ; racemis spici- 

 formibus pedunculatis 5-10 cm. longis ; bracteis parvis subulatis ca. 2 

 mm. longis ; pedicellis inferioribus ca. 4 mm. longis ; calyce cylindrico 

 demum turbinato maturitate 6 mm. longo 5-costato costis excurrenti- 

 bus extus puberulo ; corolla 1.7 cm. longa glabra; fructu obovoideo 

 spinis solis e calyce exsertis. — Alta Mira, Tamaulipas, Mexico, 14-22 

 May, 1898, E. W. Nelson, no. 4415 (type, in hb. Gray and hb. U. S. 

 Nat. Mus.). 



Russelia cuneata, n. sp., modice robusta 1 m. alta verisimiliter fru- 

 tescens ; caulibus acute 4-gonis 4-costatis glabris laevisque prope 

 nodos solum sparse pubescentibus, internodiis 5-10 cm. longis folia 

 saepissime superantibus ; foliis oppositis firmiusculis 5-8 cm. vel ultra 

 longis rhomboidei-oblongis supra mediam partem crenato-dentatis basi 

 longe cuneatis integriusculis utrinque sparse puberulis vel subglabris ; 

 cymis multifloris ca. 3 cm. longis saepissime binis in axillis superiori- 

 bus oppositis oriuntibus, pedunculis crassiusculis sordide pubescentibus 

 ca. 6 mm. longis, pedicellis puberulis 4-6 mm. longis flexuosis ascen- 

 dentibus ; calycis lobis ovatis acuminatis brevissimis praecipue in costa 

 media hispidulis margine subscariosis ca. 2 mm. longis ; corolla tubu- 

 losa sanguinea in sicco nigrescenti 1 cm. longa glabra, lobis limbi 

 brevissimis suberectis. — On granitic soil, El Ocote, Michoacan, Mex- 

 ico, December, 1898, alt. 300 m., E. Langlasse, no. 723 (type, in hb. 

 Gray). From its square stem and numerously flowered cymes near R. 

 floribunda HBK. and B. syringaefolla Schlecht. & Cham., but clearly 

 distinct by its entirely different leaf-contour, smaller flowers, etc. 



