Massonia is a genus of bulbous perennial flowering plants belonging to the family Asparagaceae (subfamily Scilloideae, also treated as the family Hyacinthaceae) within the order Asparagales. The genus comprises approximately 33 accepted species, all native to southern Africa, with a centre of diversity in Namaqualand and adjacent arid regions of the Western and Northern Cape.
Plants grow from underground bulbs with pale brown, papery to leathery outer tunics — the classic geophyte strategy for surviving harsh, seasonally dry conditions. Massonia is decidedly a winter-grower: it remains dormant through the hot, dry summer months and emerges with the onset of cooler, wetter winter weather. Each plant produces just two relatively broad leaves that spread out on either side of the stem, often lying nearly flat on the ground. Between or above these leaves rises a short, dense raceme of flowers held at or near ground level, sometimes accompanied by a tuft of green bracts at the top of the inflorescence. The individual flowers are pale — white, or flushed with green, yellow, or pink — and bell-shaped to somewhat tubular, with the tepals joined at the base into a short or long tube. The stamens are more or less erect; their filaments are fused both to the tip of the tepal tube and to each other, forming a distinctive small cup. Seeds are dull black.
The genus Whiteheadia has been merged into Massonia, and the combined group is classified as a cryptophyte — a plant whose perennating organs (bulbs) are buried below the soil surface. One of the most remarkable biological features of the genus is the pollination system of Massonia depressa, which has been shown to be pollinated by rodents, specifically two species of gerbil (Gerbillurus paeba and Desmodillus auricularis). Rodent pollination is exceptionally rare among flowering plants worldwide.
The genus is named in honour of Francis Masson, a Scottish botanist and gardener who served as Kew Gardens' first official plant collector — the first person sent out by Kew specifically to collect living plants and seeds from distant regions.
Etymology
The genus name Massonia honours Francis Masson (1741–1805), a Scottish botanist and gardener who became Kew Gardens' first plant hunter — the first collector formally dispatched by the Royal Botanic Gardens, Kew, to gather living plants from abroad.
Distribution
Massonia is native to southern Africa, with diversity centred in Namaqualand and the broader Cape Floristic Region. Species favour localities with hot, dry summers and cool, wet winters, and the plants are dormant through summer, growing and flowering only in the winter season.
Ecology
Massonia species are winter-growing geophytes, surviving the hot dry season as dormant underground bulbs. At least one species, Massonia depressa, is pollinated by rodents — specifically two gerbil species (Gerbillurus paeba and Desmodillus auricularis) — a pollination syndrome that is exceptionally rare among flowering plants.
Cultivation
Massonia species are described as "essentially plants for the collector." In climates subject to frost they require the protection of an alpine house or bulb frame. Well-drained soil and a sunny position are essential. Plants can be propagated by seed, though seedlings take at least two to four years to reach flowering size.
