Craigia yunnanensis Seeds | Yunnan Craigia

Yunnan Craigia (Craigia yunnanensis) with broad leaves and pale yellow flowers on a rare valley tree — Yunnan Craigia (*Craigia yunnanensis*): Malvaceae, a rare deciduous tree of warm Yunnan valleys, with winged seed in papery capsules.

LATIN NAME: Craigia yunnanensis

COMMON NAME: Yunnan Craigia

Plant Profile

Yunnan Craigia is a deciduous tree of the mallow family, fifteen to twenty metres in good ground, with broad, heart-shaped leaves, pale yellow flowers in loose clusters, and fruit that splits into papery capsules full of winged seed. It is rare everywhere, and most people meet it first in a botanical collection rather than in the wild.

Its range is fragmented: warm, moist valleys in southern Yunnan and neighbouring Guangxi, plus a few populations across the border in Vietnam. The tree wants deep alluvial soil, a sheltered position and a long, humid summer. Clearing of valley forest for agriculture has removed most of that habitat.

Science & Biotechnology

Craigia is one of the older lineages in the subfamily that once held the limes and jutes, and its combination of winged seed and mallow-like flower kept it taxonomically unsettled for decades. Molecular work placed it firmly in Malvaceae, close to the Tilia group, and confirmed its separation from the similar genus Burretiodendron.

Conservation genetics has been the main line of research. Populations are small and widely separated, seed set is poor in some years, and germination in the wild is limited by a combination of short seed viability and predation. Ex situ collections in Chinese botanical gardens now hold most of the accessible genetic diversity.

Uses & Benefits

The wood is pale, fine-grained and workable, and local use as a timber tree contributed to its decline. In cultivation its value is different: a shapely deciduous tree with good autumn colour and unusual fruit, suited to parks and large gardens in warm-temperate climates.

Its conservation role is more important than its ornamental one. Botanic gardens grow it as an insurance population, and the species appears in reintroduction trials in Yunnan, where seedlings are raised for planting into protected valley remnants. Seed from garden plants is worth collecting where two trees stand close together, since the species sets little fruit in isolation.

Growing from Seed

Sow fresh. The seed has no deep dormancy but it dies quickly, so clean it from the capsule, float off the empty grains, and put the rest into a moist, free-draining mix at twenty to twenty-five degrees. Expect germination within four to six weeks, unevenly.

Seedlings grow fast in their first season and need space early. Give them a deep pot, bright light with shade from the worst afternoon sun, and steady water. Plant out at the start of the rainy season, stake against wind, and keep the roots mulched. The first flowers can appear in the fifth or sixth year.

Our Take

A rare tree worth growing for its own sake as much as for its looks. Fresh seed, warm conditions and a sheltered valley-like spot are what it asks. It is not a tree for exposed ground, and it will not forgive a summer drought in its first years. Plant it young, since older trees move badly.

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