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 іп 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 rhombieally widened below the nodes. Cataphyls a single basal 
pair, or occasionally 2 or 3 pairs, tubular-bifid. Leaves ovate-lanceolate, 
5x10 em., or obovate and reduced to 2x3.5 em., 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 & Luz, 3140, Apr. 1892,—the type). Costa Rica. Paramo del 
Abejoval (? Tonduz, 1840). Tucurique (? Tonduz, 13142). These lat- 
ter,—f. australis,—have smaller leaves (3.5x5 em.) 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. Р. 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. 
Seareely forked, the rather long branches with basal eataphyls only, 
androgynous. Internodes moderate (2-6x30-60 mm.), smooth, sharply 
ancipital or somewhat rhombie and dilated upwards. Cataphyls a single 
pair, seareely 5 mm. above the base, openly annular. Leaves ovate, very 
obtuse, 3-5x8-9 em., euneately or rather abruptly petioled for 5-8 mm. 
Spikes more or less clustered, rather long (20, beeoming 40-60 mm.), 
