250 THE JOURNAL OF BOTANY 



Megalostylis, 



EuPHORBiACEARUM G subtribu Plukenetiearum, genus novLiiii. 



Flores masc. — sepala 3, aestivatione valvata. Petula et discus 

 0. Stamina 6 ; filamenta in columnam cylinclricam consolicla ; 

 antherae didymse, biloculares ; rud. ? 0. Flores fem. — sepala 6, 

 a3stivatione imbricata. Discus 0. Ovarium 3-loculare, stylo magno 

 crasso clavato apice integro coronatum. Ovula in loculis solitaria. 

 Fructus ignotus. — Planta monoica, verisimiliter frutex scandens. 

 Folia alterna, ampla, 5-nervia. Flores in cymas axillares breves 

 bracteis cincti digesti. 



M. Poeppigii, sp. unica. Foliis longiuscule petiolatis late 

 ovatife obtusis nonnunquam breviter cuspidulatis basi late truncatis 

 brevissimeve cordatis membranaceis utrobique pilis abbreviatis 

 sparsim obsitis, pedunculis petiolis multo brevioribus ut ramuli 

 necnon petioli subtiliter sericeo-puberulis, bracteis ovatis obtusi- 

 usculis vel obtusis, sepalis (^ oblongo-spatbulatis obtusissimis 

 quam sepala ? ovato-lanceolata brevioribus omnibus ut bracteas 

 puberulis, columna staminea quam sepala paullo breviore, ovario 

 globoso breviter sericeo, stylo ovarium pluries superante basi 

 sericeo ceteroquin glabro. (Tab. 544, fig. 2.) 



Hab. Peru or Brazil (upper Amazon region) ; PoRppig, sine no. 



Folia exempl. unici nobis obvii adusque 11 x 9 cm., ssepius 

 vero minora, supra in sicco badio-subtus griseo-viridia ; costulae 

 perspicuae, horizontales vel fere horizontales ; petioli 2-5-4-5 cm. 

 long., graciles. Cymae in toto 2-2-5 cm. long. Bracteae 3-4 mm. 

 long. Sepala ^ 2 mm. long., ? usque ad 2-5 mm. Columna 

 staminea 1-8 mm. long., antherae vix -5 mm. Ovarium diam. 1 mm. 

 paullulum excedens ; columna stylaris 8 mm. long, paullo curvatus. 



This genus differs from Plukenetia in the involucrate in- 

 florescences, the trimerous male flowers with few stamens on a 

 slender column, didymous not tetradymous anthers and the entire 

 style. Angostylis, with a trimerous calyx to its male flowers and 

 didymous anthers, has exinvolucrate flowers, the males with 

 numerous stamens, the females wdth a well-developed stigma. 



2. Plants Africans nov^ vel rariores. 



EUBIACE^. 



Oldenlandia Duemmeri, sp. nov. Verisimilter perennis 

 caulibus e rhizomate satis valido casspitosis tenuibus superne 

 ramosis ramis distanter foliosis scabriusculis mox glabris, foliis 

 parvis sessilibus sacpe ad basin ramulorum floriferorum quasi- 

 verticillatis anguste linearibus apice pungentibus margine revolutis 

 scabriusculis, stipulis abbreviatis 2-3-setosis, floribus parvulis in 

 cymas axillares terminalesve laxas paucifloras dispositis, pedicellis 

 filiformibus flore plane longioribus, ovario hemisphasrico glabro 

 calycis lobis (sine dentibus interjectis) 4 deltoideis acutis margine 

 ciliatis aequilongo, corollas parvulae hypocraterimophse tubo calycem 

 excedente satis lato juxta medium constricto glabro lobis ovato- 

 oblongis obtusis tubo paullulum brevioribus, antheris medio tubo 

 insertis, stylo breviter exserto, stigmate bilamellato. 



