Colona thorelii

Colona thorelii[1] is a species small tree, in the family Malvaceae[2] and now placed in the subfamily Grewioideae; it is named after the French botanist Clovis Thorel. No subspecies are listed in the Catalogue of Life.[2]

Colona thorelii
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Malvales
Family: Malvaceae
Subfamily: Grewioideae
Genus: Colona
Species:
C. thorelii
Binomial name
Colona thorelii
Synonyms

Columbia thorelii Gagnep.
Colona sinica Hu

The species is distributed in southern China (S. & SE. Yunnan), Indo-China (including Vietnam[2][3]) and Peninsula Malaysia.[4]

Description

Trees grow to 5–15 m tall, in forested areas up to 800m. The branches are grey-brown stellate and tomentose.[5] Leaves have a petiole 5–10 mm; leaf blades are oblong, 80-150 × 40–70 mm, thinly leathery, densely grey stellate tomentose abaxially, adaxially glabrous, smooth or slightly rough. There are five basal veins and 2-3 pairs of lateral veins; the leaf-base is rounded, margins are plain or slightly serrated near the (acute or acuminate) apex.

Flowering occurs in September–October in southern China with 40–90 mm inflorescences which are terminal or axillary at twig tips. Flower petals are 5–6 mm, with stamens as long as the petals. The bracts are triangular, ovate, or lanceolate, 5–6 mm; bracteoles obovate; pedicel 3–5 mm. Sepals are narrowly lanceolate, 6–7 mm, abaxially grey hairy and adaxially glabrous. The ovary is 3-loculed, hairy; style ca. 5 mm; the stigma is 2-lobed.[5] The grey seed capsules are 20–25 mm in diameter, velvety and 3-winged, with wings approx. 10 mm wide.

Vernacular Names
  • Chinese: 狭叶一担柴 xia ye yi dan chai[5]
  • Vietnamese: cọ mại nháp, bồ an Thorel[3]

References
  1. Burret KEM (1926) In: Notizbl. Bot. Gart. Berlin-Dahlem 9(88): 808.
  2. Roskov Y.; Kunze T.; Orrell T.; Abucay L.; Paglinawan L.; Culham A.; Bailly N.; Kirk P.; Bourgoin T.; Baillargeon G.; Decock W.; De Wever A. (2014). Didžiulis V. (ed.). "Species 2000 & ITIS Catalogue of Life: 2014 Annual Checklist". Species 2000: Reading, UK. Retrieved 6 April 2019.
  3. Phạm Hoàng Hộ (1999) Cây Cỏ Việt Nam: an Illustrated Flora of Vietnam vol. I publ. Nhà Xuẩt Bản Trẻ, HCMC, VN
  4. POWO: Colona thorelii (Gagnep.) Burret
  5. "Colona thorelii in Flora of China". Retrieved 6 April 2019.
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