Pterostylis umbrina (D.L.Jones) G.N.Backh. APNI* Synonyms: Bunochilus umbrinus D.L.Jones APNI*
Description: Terrestrial herb
Rosette stalk 20–65 mm long; leaves 3–5, lanceolate to elliptic, 7–35 mm long by 4–10 mm wide, margins entire, plane or undulate; petioles to 4 mm long.
Flowering plants 15–60 cm tall; stem leaves 4–7, lanceolate, 20–80 mm long by 4–9 mm wide. Flowers 1–6, 14–17 mm long by 7–9 mm wide, green with dark green stripes. Dorsal sepal 16–20 mm long when flattened, shallowly curved, tip orange-brown. Synsepalum broadly ovate, 13–15 mm long by 7–9 mm wide, flat, notched to 5–6 mm deep; margins curved; tips divergent to 5–7 mm apart, orange brown. Petals narrow at the base where c. 2 mm wide, broadly flared near the middle, 13–15 mm long by 3–4 mm wide; anterior margin curved; basal flanges absent. Labellum oblong to oblong-obovate, 6–7 mm long by 2.3–3.0 mm wide, light brown to brown with a darker fuscous central stripe; surface cells rounded and bead-like, with short acicular cells clustered around the base; basal mound short, erect, truncate, similar colour to the central stripe; margins parallel or shallowly concave; lateral lobes well developed; midlobe 2.0–2.3 mm long, narrowly notched, the lobes acuminate; apex upcurved.
Flowering: August–October
Distribution and occurrence: Between Albury and Yass in Ranges and Tablelands, between 400–900 m elevation Gullies and faces within sclerophyll forest, usually open eucalypt woodland.
NSW subdivisions: ST, SWS
Text by Matt A.M. Renner (16 Dec 2019) based on Jones (2006)
Taxon concept: Jones DL (2006) Towards a revision of Bunochilus D.L.Jones & M.A.Clem. Australian Orchid Research 5: 112–142.
APNI* Provides a link to the Australian Plant Name Index (hosted by the Australian National Botanic Gardens) for comprehensive bibliographic data
***The AVH map option provides a detailed interactive Australia wide distribution map drawn from collections held by all major Australian herbaria participating in the Australian Virtual Herbarium project.
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