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Drosera androsacea

Range: southwest Australia, surrounding Perth

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Named after the flower resemblance to rock jasmines, this pygmy sundew grows in sandy or gravelly loam soils in open shrubby habitats that frequently become rock-hard in summer drought. Plants only reach 2 cm in diameter, with a generally flat rosette of paddle-shaped leaves. Petioles are flattened and taper slightly toward the base and abruptly adjacent to the round, slightly cupped lamina. Coloration is generally green in the petiole and brilliant crimson in the lamina, or green throughout with scarlet tentacles. Inflorescences reach only around 6-8 cm tall, with a glandular peduncle of variable density and up to 7 blooms. Each flower is approximately 1.5 cm in diameter, with broad elliptic to slightly obovate petals that are variably white to median pink, usually with a darker pink streak in the central base and something darker petal edges. In summer, this species typically shrinks to a dense dormant stipule bud. It can be distinguished from related species, particularly D. spilos, by its 5-style stigmas and angular 5-sided stipular bud along with minute details of the stipule structures.

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Cultivation: grow in a 2:1 sand/peat mix in moderately deep pots, kept moist throughout the year (wetter in winter) and temperatures of between 45-70°F during winter, somewhat warmer in summer. Reduce photoperiod in winter to less than 10 hours to trigger gemmae and flower production. If plants go dormant due to heat or drought they can be difficult to return to growth. Sow gemmae (seeds are rare and may require summer stratification) on soil surface, and grow in strong artificial light to full sun.

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Lifespan and reproduction: perennial, to about 5 years. Reproduces through gemmae, and, rarely, seed. May also possibly be propagated via leaf pullings.

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Sources: https://www.inaturalist.org/observations/248209982 Author Caroline Telfer, under https://creativecommons.org/licenses/by-nc/4.0/

Lowrie et al. (2017). Drosera of the World Vol. 2. Redfern Natural History Publications.

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