ROBINSON. — DIAGNOSES OF TROPICAL AMERICAN PHANEROGAMS. 613 
VI. DIAGNOSES AND TRANSFERS OF TROPICAL 
AMERICAN PHANEROGAMS. 
By B. L. Ropryson 
Antigonon grandiflorum (Bertol.), n. comb. Polygonum grandiflo- 
rum Bertol. Bologn. Nov. Comm. iv. 412 et Florula Guatimalensis, 12 
(1840). Antigonon guatimalense Meisn. in DC. Prod. xiv. 184 (1856). 
A. guatemalense Hems). 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 em. 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 em. longa glabra ; fructu obovoideo 
spinis solis e calyce exsertis. — Alta Mira, Tamaulipas, Mexico, 14-22 
May, 1898, EB. W. Nelson, no. 4415 (type, in hb. Gray and hb. U. 8. 
Nat. Mus.). io a 
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 em. longis folia 
saepissime superantibus ; foliis oppositis firmiusculis 5-8 cm. vel ultra 
longis rhomboidei-oblongis supra mediam partem crenato-dentatis basi 
