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Drosera hirsutaD. hirsuta is one of the species in the macrantha complex consisting of D. eremaea, D. hirsuta, D. indumenta, D. macrantha and D. planchonii. It is a climbing species reaching 45 to 60 cm in length. The typical feature of this species is its glandular lower stem section and the densely hirsute uppermost stem section. The flowers are usually white but a pink flowered form is also known.
The tubers of this species are white and smooth according to Lowrie, but I usually find wart-like structures on their surface, including those tubers directly obtained from Allen. Therefore I am not sure how solid this criterion is. Please check out the pictures below in that respect.
A short summary of typical features within the macrantha complex:
D. eremaea: scattered minute glands on the stem, tuber white and smooth, seeds have a spear-like apex
D. hirsuta: glabrous stem, upper part densely hirsute (=covered with non-glandular hairs), tuber white and smooth, seeds have a wide, one-sided wing
D. indumenta: stem covered with hairs along its full length, tuber white and warty, seeds have a narrow one-sided wing
D. macrantha: lower stem section glabrous, upper section glandular, tuber white and warty, seeds have a wide, spear-like apex
D. planchonii: lower stem section glabrous, upper section sparsely glandular, tuber white and warty, seeds with a narrow, longitudinal, one-sided ledge a wide, paddle-like apex
Allen Lowrie offered D. hirsuta as D. aff. macrantha Northern Heathland Form in the past.
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