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ROBINSON AND BARTLETT. — PLANTS FROM GUATEMALA AND MEXICO. 51 



Department of Zacapa, Guatemala, 12 January, 1905, C. C. Deam, 

 no. 361 (type, in hb. Gray) ; Maria Madre Island, Tres Marias Islands, 

 May, 181)7, E. W. Nelson, no. 4275 (hb. Gray). This species appears 

 to be either monoecious, as in Mr. Beam's specimen, which has stami- 

 nate flowers at the base of some of the pistillate inflorescences, or it 

 may be dioecious, as in Mr. Nelson's specimen, in which all the flowers 

 are staminate. The species appears to stand nearest M. cordifoUa 

 Liebm., but differs in its ovate rather than suborbicular less rugose 

 leaves and wholly sessile inflorescences. 



Polygonum longiocreatum Bartlett, n. sp., caule simplici ca. 7 

 dm. alto, ad nodos inferiores radicanti ; internodiis 1.5-2 cm. longis 

 glabris ; ocreis cylindricis eciliatis 1.5-1.7 cm. longis, in parte inferiore 

 caulis quam internodiis brevioribus, plus minusve inflatis, in parte 

 superiore imbricatis ; foliis lanceolatis 1.5-3 cm. latis 9-13 cm. longis 

 perbreviter petiolatis, apice basique acutis, utrinque glabris pellucido- 

 punctatis, margine nervisque subtus scabris ; spicis ca. 9, paniculatis 

 erectis 4-5 cm. longis ; pedunculis pedicellisque glabris ; ocreolis rubris 

 2 mm. longis tri-vel quadrifloris ; calyce rubro 5-partito ; staminibus 7 

 styloque (solum in extreme bifido) inclusis ; achenio lenticulari 2 mm. 

 longo nigro, ad basin rotundato, ad apicem abrupte acuto, faciebus 

 convexis. — In a swamp at Gualan, Department of Zacapa, Guatemala, 

 January 14, 1905, C. C. Deam, no. 374 (type, in hb. Gray). The ob- 

 vious affinity of P. longiocreatum is with Polygonum spectahile Mart., 

 from which it differs in not having glandulose-scabrous peduncles. In 

 his treatment of P. spectahile in De Candolle's Prodromus, Meisner 

 cites two earlier-published species of Weddell as possible synonyms. 

 Dr. Small accepts, in his " Monograph of the N. A. Species of Poly- 

 gonum," one of Weddell's names, Polygonum ferrugineum, as an avail- 

 able name for P. spectahile Mart. Whether he applies the name 

 correctly or not, P. longiocreatum may be distinguished from the 

 P. ferrugineum of Small's monograph by the style, which in the former 

 is bifid only at the end, and by the long pedicellate flowers, small 

 achenes, and short-petioled leaves. 



Ruprechtia Deamii Robinson, n. sp., frutico.sa (? solum visa); 

 ramis flexuosis glabris in specimine exsiccato sulcato-rugosis brunneis, 

 internodiis 7-30 mm. longis, ocreis membranaceis griseo-castaneis vix 

 0.6 mm. longis ; foliis magnis oblongis coriaceis penninerviis 10-18 cm. 

 longis 5.5-8 cm. latis integerrimis concoloribus utrinque prominulenter 

 reticulato-venulosis subtus in nervis patenter fulvo-pubescentibus et in 

 venulis puberulis, basi rotundatis vel modice angustatis, apice obtusis 

 vel rotundatis, petiolo brevissimo crassiusculo supra leviter canaliculato 

 ca. 3 mm. longo ; racemis numerosis fructiferis 2-6 cm. longis solitariis 



