54 , THE GENUS PHOEADENDKON 



C. CALYCULATAE. 



Spikes rather long, 3- to 5- jointed, each joint with numerous flowers 

 in about 12 series. Berries globose, granular-papillate, moderately small 

 (4 mm.), white?. The young growth is rather sparingly long-villous. 

 Mexico. 



Stems broadly winged and nerved. ALATAE. 



8. ALATAE. 



Stems decussately much flattened, with nerved wings. Leaves fal- 

 cately lanceolate. Mountains of central Mexico. 



Stems and leaves strongly nerved. P. calyculatum. 



Phoradendron calyculatum n. nom. 



Viscum falcatum Hooker, Icon. Plant, vol. 4. pi. 368. 1841. 

 Phoradendron falcatum Eichler in von Martius, Fl. Brasil. vol. 5. pt. 2. 

 p. 107. 1868. 



Not forked, the very long, much compressed branches without cata- 

 phyls, dioecious. Internodes rather long (60-100 mm. or more), at first, 

 like the foliage, sparingly hairy and somewhat resinous-dotted, 2-edged. 

 from 5 mm. at base dilated to 20 mm. above. Leaves falcate, narrowly 

 lanceolate, obtuse, 1x15-25 cm., gradually narrowed into thick petioles 

 about 10 mm. long, about 5-nerved and veiny. Spikes mostly solitary, 

 moderate, (30-40 mm.), usually somewhat villous, with 3-5 oblong joints 

 some 50-flowered : peduncle 2-3 mm. long : scales typically somewhat vil- 

 lous, long-ciliate like the often deeply lobed calyx-like receptacular cups. 

 Fruit globose, 4 mm. in diameter, minutely granular-papillate: sepals 

 short, glabrate, parted.- Plates 62, 63. 



Sierras and Cordillera of Mexico ( ? exclusively) on Quercus. The 

 type from eastern Mexico. 



Specimens examined : MEXICO. Jalapa (Linden, 538, 1839 : Galeotti, 

 2696, 1840, the type of V. falcatum Hooker) . Oaxaca (Andrieux, 346) . 

 Sierra de S. Felipe (Pringle, 4699). Tlapancingo (Nelson, 2074). With- 

 out locality (Karwinski). Cuernavaca, Morelos (Pringle, 13189). 



Strongly marked in its chief characteristics, but presenting several 

 distinguishable forms: filipes (PI. 64), with the slender staminate spikes 

 borne on a filiform peduncle 10-12 mm. long (Zacuapam, V. C., Purpus, 

 6279, 1912, with the type) ; occidentale, with longer spikes as much as 60 

 mm. long, of about 6 joints (Sierra de Nayarit, Jalisco (Diguet, 111, 

 forming hanging tufts 2 mm. or more long) ; Gonzalezi (PI. 64), with 

 shorter broader sometimes obovate leaves 1-2x3.5-5 or even 9 cm. (Canada 

 de S. Gabriel, Etla (Conzatti & Gonzales, 295). 



