Grassland; cultivated Lilayi
The tubers are roundish to discoid in shape with no easily discernible growing point
May 2015
Photo: Nick Wightman
Synonyms: |
Tacca involucrata Schumach. & Thonn. |
Common names: | Arrowroot (English) |
Frequency: | |
Status: | Native |
Description: |
Erect herb up to 2 m tall, with annual leaves and flowers growing from a fleshy tuber. Leaves usually 1-3; petiole erect up to c. 1.5 m tall; lamina compound, up to c. 90 × 60 cm, broadly 3-lobed, the lobes deeply pinnately and sometimes palmately divided into variable secondary lobes. Inflorescence usually 1, rarely 2 on an erect hollow scape, up to 1.7 m tall. Flowers 10-40 in an umbel, pale green to white, yellowish or brown, usually variably tinged purple. The whole inflorescence subtended by an involucre of 4-8 bract up to c. 4 × 3 cm, green with purple margins and numerous more or less pendent floral bracts, filiform, dark purple, up to 25 cm long. Fruit berry-like, globose to ovoid, 2-3 cm long, pendent, green to orange, dark brown when dry, normally only 2-7 flowers per umbel developing fruit. |
Type location: |
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Notes: | A unique and unmistakable plant |
Derivation of specific name: | |
Habitat: | In a wide range of habitats, on termite mounds and in rocky places, often on sandy soils. |
Altitude range: (metres) | |
Flowering time: | Dec - Jan |
Worldwide distribution: | Widespread in Subsaharan Africa from Senegal to Zimbabwe and Mozambique. Also in Madagascar, Comoros, Mauritius, Seychelles and tropical Asia to the Pacific. |
Botanical divisions: | |
Growth form(s): | |
Endemic status: | |
Red data list status: | |
Insects associated with this species: | |
Spot characters: | Display spot characters for this species |
Literature: |
Baumann, G. (2005). Photographic Guide to Wildflowers of Malawi Wildlife and Environmental Society of Malawi Pages 186 - 187. (Includes a picture). Mapaura, A. & Timberlake, J. (eds) (2004). A checklist of Zimbabwean vascular plants Southern African Botanical Diversity Network Report No. 33 Sabonet, Pretoria and Harare Page 112. Ntore, S. & al. (2024). Checklist of the vascular plants of Burundi Page 104. Strugnell, A.M. (2006). A Checklist of the Spermatophytes of Mount Mulanje, Malawi Scripta Botanica Belgica 34 National Botanic Garden of Belgium Page 179. Troupin, G. (1988). Taccaceae Flore du Rwanda Spermatophytes Volume IV Pages 86 - 87. (Includes a picture). Vollesen, K. & Merrett, L. (2019). Field Guide to the (wetter) Zambian Miombo Woodland. Part 1 (Ferns & Monocots) GVPedia Communications Page 123. (Includes a picture). Wilkin, P. (2009). Dioscoreaceae Flora Zambesiaca 12(2) Pages 138 - 140. in Dioscoreaceae (Includes a picture). |