Prev Taxon: Genus Phreatia section Rhizophyllum
Current Genus: Genus Phreatia section Saccophreatia
Next Taxon: Genus Pilophyllum
Phreatia vandenbergiae
Phreatia vandenbergiae Ormerod, Malesian Orchid J. 13 (2014) 64, fig. 17.
Type: J. Vandenberg NGF 39666 (holo A, iso BO, BRI, CANB, K, L, LAE).
Synonyms:
Epiphytic or terrestrial herb. Roots terete, to 0.13 cm thick. Pseudobulbs ovoid-subcylindric, 2–3-leaved, erect, to c. 3 by 0.6 cm. Leaves , erect ligulate to ligulate-oblanceolate, coriaceous, 8–19.6 by 1.1–1.6 cm (including the 1.3–3 cm long petiole-like base); leaf sheaths semi-tubular, to 3 cm long; apex unequally obtusely bilobed to acute. Inflorescences basal, erect, 29–35.3 cm long; peduncle laxly 3–8-sheathed, 19–22.5 cm long; sheaths 0.5–2.2 cm long; rachis densely many-flowered (but often more laxly in the upper half), 10–12.8 cm long; floral bracts elliptic, to 0.55 by 0.22 cm, with acute apex. Pedicel and ovary thickly clavate, 0.55 cm long. Median sepal broadly ovate, 0.25–0.28 by 0.225–0.25 cm; apex subacute. Lateral sepals obliquely widely ovate, 0.3–0.42 by 0.3–0.38 cm (0.3–0.32 cm along midnerve); apex subacute. Petals obliquely ovate, 0.25 by 0.195–0.2 cm; apex subacute. Lip broadly sagittate0.25–0.26 by 0.275–0.3 cm; claw semi-tubular, subsaccate at the base, with an ellipsoid, forward-pointing sac c. 0.09 cm long with obtuse apex; blade broadly ovate, with subacute apex, at the base with 2 patches of dense farinose pubescence; 3-nerved. Column stout, c. 0.2 cm long (to tips of stelidia); column foot c. 0.1 cm long.
(After Ormerod, 2014)
Leaves yellowish green to shiny midgreen above, paler below. Floral bracts dark purple. Flowers white.
Upper montane, more or less mossy and moist forest, common clumped epiphyte of the middle spaces on tree trunks, and terrestrial. Altitude 2770–3350 m.
Malesia (New Guinea), endemic.
Papua New Guinea (Simbu Prov.), see map
Cool growing epiphyte.
June.
- Family Orchidaceae
- Subfamily Epidendroideae
- Tribe Podochileae
- Subtribe Thelasiinae
- Genus Phreatia
- Section Saccophreatia
- Species Phreatia vandenbergiae
Phreatia vandenbergiae (section Saccophreatia) is most similar to P. resiana J.J. Sm. in the sessile lip lamina, but differs in the longer leaves (8–19.6 versus 6–7.5 cm), longer peduncle (19–22.5 versus 2.5–4.5 cm), longer rachis (10–12.8 versus 3.5–5 cm), flowers with obliquely ovate petals (not trullate), a widely ovate lip blade (not triangular), and a much more pronounced and extended stigmatic area.
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Phreatia vandenbergiae
Phreatia vandenbergiae Ormerod, drawing by Paul Ormerod in Malesian Orchid J. 13 (2014) 64, fig. 17, based on the holotype, J. Vandenberg NGF 39666 (holo A, iso BO, BRI, CANB, K, L, LAE).