Drosera capillaris Poir

BOTANICAL NAME: Drosera capillaris Poir. COMMON NAME: Pink sundew.

RANGE: The southeastern coastal plain from Virginia to eastern Texas, with a few disjunct locations in piedmont bogs.

FLOWERING SEASON: May to August.

TRAP SEASON: Leaves tend to remain all year. There are no winter hibernacula.

DESCRIPTION. —D. capillaris is a prostrate rosette averaging 3.5 cm across, but growing up to 7.5 cm in some extreme southern locations. The petioles are of moderate length, 1.0-2.5 cm, and the blades are somewhat elliptical, always longer than wide. The whole plant is frequently bright red when growing in the open. There is a prevalent notion that the flowers are always pink and that this provides a ready differential from D. rotundifolia. Not so. The flowers are either pink or white, the former somewhat more frequent.

GENERAL. — This is undoubtedly the most ubiquitous sundew throughout the southeastern coastal plain. Ecologically speaking, I always think of it as the minimal carnivorous plant, since if a likely location for carnivorous plants can support only one species it will probably be the hardy D. capillaris. A southeastern grass-sedge bog without D. capillaris must indeed be in sorry straits.

A larger form that I have found on the Gulf coast amid the rather ordinary forms needs more study.' So far, it does maintain its more robust growth habitus when grown in the greenhouse under the same conditions as the smaller form. My impression is that the larger plant also grows and/or retains more leaves than the smaller.

Fig. 5-17. Flowers of D. capillaris. These are most frequently, but not always, pink.

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