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Pterostylis lineata (D.L.Jones) G.N.Backh.
Family Orchidaceae
Pterostylis lineata (D.L.Jones) G.N.Backh. APNI*

Synonyms: Bunochilus lineatus D.L.Jones APNI*

Description: Terrestrial herb

Rosette stalk 20–100 mm long; leaves 4 to 6, lanceolate to narrow elliptic, 10–45 mm long by 3–10 mm wide, margins entire and plane or crinkled; petioles to 3 mm long.

Flowering plants 20–60 cm tall, stem leaves 5 to 8, linear-lanceolate 20–80 mm long by 3–6 mm wide. Flowers 1–10, porrect, remote, 17–20 mm long by 5–7 mm wide, pale translucent green with darker green stripes, nitid; sepal tips orange to orange-brown. Dorsal sepal 13–16 mm long when flattened, shallowly curved. Synsepalum elliptical, 12–13 mm long by 5–7 mm wide, flat, notched to 3–4 mm deep; margins curved, tips divergent to 3–5 mm apart. Petals obliquely oblong, narrow at base where c. 1.0 mm wide, 12–15 mm long by 2.5–3.0 mm wide; anterior margin straight or shallowly curved, basal flanges absent. Labellum oblong, 6.0–7.0 mm long by 3.0–3.5 mm wide, tawny yellow to yellow-brown with a black basal mound and central stripe; surface cells bead-like, with numerous acicular cells to 0.5 mm long toward the base; basal mound erect, rounded, obtuse; margins paralle or shallowly concavel, lateral lobes well-developed; midlobe c. 1.5 mm long, shortly notched, the lobes acute; apex upcurved.


Illustration
L. Elkan

Flowering: August–October

Distribution and occurrence: Eastern New South Wales including the Central and Northern Tablelands from the Blue Mountains and Barrington Tops and possibly further north to Tablelands behind Port Macquarie, between 400 and 1100 m elevation.

Among shrubs and grasses on slopes in wet sclerophyll forest, often on sandy soils over sandstone. Colonises roadside embankments and track sides.
NSW subdivisions: NT, CT
AVH map***

Text by Matt A.M. Renner (12 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. Backhouse GN (2007) A new name in the terrestrial orchid genus Pterostylis R.Br. (Orchidaceae) for Victoria. The Victorian Naturalist 124(6): 341.


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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