Common name: Streaked Rock Orchid
Dendrobium striolatum Rchb.f. APNI*
Synonyms: Dockrillia striolata (Rchb.f.) Rauschert APNI*
Dockrillia banksii D.L.Jones & M.A.Clem. APNI*
Description: Stems spreading to pendent, wiry, rooting mostly at the base of the sympodium but also occasionally from more apical stems, 1–3 cm long, c. 1 mm diam., with 1 leaf at apex: roots smooth, mostly creeping.
Leaves spreading to pendent, linear, terete, 4–11 cm long, 2–3 mm diam, succulent, shallowly furrowed.
Inflorescences 0.8–3.5 cm long, 1- or 2-flowered. Sepals and lateral petals cream to dull yellow, to mushroom grey-brown with a few brown, with or without red or purple striations; dorsal sepal 13–15 mm long, c. 2 mm wide; labellum white, 7–10 mm long, 3–7 mm wide, margins undulate. Column 3–4 mm long; column foot 4–6 mm long.
Distribution and occurrence: Grows on rocks, rarely on trees, in exposed situations in sclerophyll forest and rainforest from sea level to over 1000 m; south from the Hunter R.
NSW subdivisions: CC, SC, CT, ST, CWS
Other Australian states: Vic. Tas.
Dendrobium striolatum exhibits clinal variation in flower morphology, from predominantly yellow with few or no stripes and a narrow labellum in the south to predominantly mushroom grey-brown with heavy red-brown stripes on sepals and petals, with a broad and conspicuously crispate-undulate labellum in the north. Dendrobium striolatum sporadically hybridizes with D. pugioniforme.
Text by P. H. Weston
Taxon concept: Flora of NSW 4 (1993)
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.