AEQUATORIALES HEXASTICHAE 135 



44. HEYDEANAE. 



Leaves large, rather thin, finely pinnately nerved below the middle. 

 Shoots rhombically ancipital. Cataphyls typically a single pair, on the 

 basal joint only. Flowers in 4+2 series. Central America. 



Leaves ovate : spike- joints turbinately flowered. P. Heydeanum. 



Phoradendron Heydeanum n. sp. 



Pseudodichotomous, the long branches with basal cataphyls only, 

 dioecious?. Internodes moderate (2-4x30-50 mm.) sharply ancipital, 

 somewhat rhombically widened below the nodes. Cataphyls a single basal 

 pair, or occasionally 2 or 3 pairs, tubular-bifid. Leaves ovate-lanceolate, 

 5x10 cm., or obovate and reduced to 2x3.5 cm., subobtuse, rather abruptly 

 wing-petioled for about 10 mm. Spikes often clustered, moderate (30-50 

 mm.), with 4-5 slender elongated joints somewhat turbinately about 16- 

 flowered in 4+2 series : peduncle 2-4 mm. long. Fruit ?. Plate 199. 



Guatemalan and Isthmian regions. The type from Guatemala. 



Specimens examined: GUATEMALA. San Miguel Uspantan, Quiche 

 (Heyde & Lux, 3140, Apr. 1892, the type). COSTA RICA. Paramo del 

 Abejoval (? Tonduz, 1840}. Tucurique (t Tonduz, 13142}. These lat- 

 ter, f. australis, have smaller leaves (3.5x5 cm.) and subglobose smooth 

 immature fruit 3 mm. in diameter, with closely inflexed sepals. 



45. HEXASTICHAE. 



Leaves moderate or rather large, rather thick and chartaceous, revo- 

 lute, pinnately nerved. Shoots compressed or ancipital. Cataphyls a 

 single pair, on the basal joint only. Flowers mostly in 6 series. Fruit 

 round, smooth, with closed sepals. West Indies and eastern Mexico. 



Leaves ovate to lanceolate. P. hexastichum. 



Leaves elliptical. P. Oliverianum. 



PHORADENDRON HEXASTICHUM Grisebach. 



Phoradendron hexastichum Grisebach, Fl. Br. W. I. p. 313. 1860. 

 Viscum hexastichum de Candolle, Prodromus. vol. 4. p. 282. 1830. 

 Phoradendrum hexastichum Urban, Bot. Jahrb. vol. 24. p. 46. 1897. 



Scarcely forked, the rather long branches with basal cataphyls only, 

 androgynous. Internodes moderate (2-6x30-60 mm.), smooth, sharply 

 ancipital or somewhat rhombic and dilated upwards. Cataphyls a single 

 pair, scarcely 5 mm. above the base, openly annular. Leaves ovate, very 

 obtuse, 3-5x8-9 cm., cuneately or rather abruptly petioled for 5-8 mm. 

 Spikes more or less clustered, rather long (20, becoming 40-60 mm.), 



