Drosera macrantha

{{Short description|Species of carnivorous plant}}

{{Use dmy dates|date=July 2019}}

{{Speciesbox

| image = DroseraMacranthaInflorescence.jpg

| image_caption = D. macrantha subsp. macrantha

| genus = Drosera

| display_parents = 2

| parent = Drosera sect. Ergaleium

| species = macrantha

| authority = Endl.

| subdivision_ranks = Subspecies

| subdivision =

• D. macrantha subsp. eremaea N.G.Marchant & Lowrie
• D. macrantha subsp. macrantha

| synonyms =

• D. debilis F.Muell. ex Diels
• D. macrantha subsp. planchonii (Hook.f. ex Planch.) N.Marchant
• D. macrantha var. burgesii Diels
• D. menziesii var. albiflora Benth.
• D. plancherii Dutailly
• D. planchonii Hook.f. ex Planch.

}}

Drosera macrantha, the bridal rainbow,{{FloraBase|id=3106|name=Drosera macrantha}} is a scrambling or climbing perennial tuberous species in the carnivorous plant genus Drosera that is endemic to Western Australia. It grows in a variety of habitats, including winter-wet depressions in sandy, loamy, laterite, or quartzite soils. D. macrantha produces small, cup-shaped carnivorous leaves along a long stem that can be {{convert|0.16|-|1.5|m|ft|1|abbr=on}} high as it climbs. Its {{convert|1|in|cm|1|abbr=on}} white or pink flowers emerge from June to November, blooming earlier in the more northern range.D'Amato, Peter. 1998. The Savage Garden: Cultivating Carnivorous Plants. Ten Speed Press: Berkeley, California. pp. 158.Erickson, Rica. 1968. Plants of Prey in Australia. Lamb Paterson Pty. Ltd.: Osborne Park, Western Australia. pp. 35-36.

D. macrantha was first described and named by Stephan Endlicher in 1837. It has a large, variable range, which has led to considerable synonymy. Several subspecies have been published, but most have been moved to or lumped in with the taxon D. stricticaulis.Rice, Barry. 2009. [http://www.sarracenia.com/faq/faq5263.html The tuberous erect & scrambling Drosera]. The Carnivorous Plant FAQ. Accessed online: 25 August 2009. Drosera stricticaulis itself was even first described by Ludwig Diels in 1906 as a variety of this species and was later elevated to species rank. One of the more recent subspecific taxa to be described was D. macrantha subsp. eremaea in 1992 by N. G. Marchant and Allen Lowrie (the subspecies D. macrantha subsp. macrantha is an autonym). In 1996, Jan Schlauer provided a comprehensive revision and new field key to the genus and also moved subspecies eremaea to a subspecies of D. stricticaulis, though he did not give a specific rationale for this move.Schlauer, J. 1996. [http://carnivorousplants.org/cpn/articles/CPNv25n3p67_88.pdf A dichotomous key to the genus Drosera L. (Droseraceae)]. Carnivorous Plant Newsletter, 25(3): 67-88. Other authorities, such as Western Australia's Department of Environment and Conservation's FloraBase still recognize subspecies eremaea under D. macrantha.{{FloraBase|id=13223|name=Drosera macrantha subsp. eremaea}}