Pachycarpus concolor E. Mey.
subsp. concolor

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Photo: Bart Wursten
On the ancient terracing on Nyahokwe Hill, Nyanga

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Synonyms:	Asclepias concolor (E. Mey.) Schltr. Gomphocarpus concolor (E. Mey.) Decne. Xysmalobium concolor (E.Mey.) D. Dietr.
Common names:
Frequency:
Status:	Native
Description:	Perennial herb with annual stems, growing from a cylindric vertical tuber. Stem 1-several, erect or procumbent, usually unbranched, sometimes branching near the base, up to 1 m tall, densely pubescent with spreading white or rusty hairs. Leaves opposite, spreading, shortly petiolate, linear to narrowly lanceolate or lanceolate to ovate, up to 16 × 4 cm, with slightly rough spreading white or rusty hairs on both surfaces; margin with minute crisped or rough hairs. Inflorescences terminal and extra-axillary, 1-7-flowered, scented erect umbels. Corolla spreading to broadly campanulate, reddish-brown and densely pubescent outside, white, cream or pale green with or without purple-brown markings, hairless or minutely papillate inside. Lobes up to 18 × 13 mm, broadly ovate. Corona lobes arising from the base of the staminal column, basal part swollen with 2 erect teeth, apical part ligulate or slightly spathulate, up to c. 10 mm long, erect or curved in over the staminal column. Follicle erect on a twisted pedicel, up to 12 × 3 cm, fusiform, usually not inflated, with 6 narrow longitudinal ridges.
Notes:
Derivation of specific name:	concolor: of one colour
Habitat:	In open burned grassland.
Altitude range:	300 - 1500 m
Flowering time:	Oct - Apr
Worldwide distribution:	Botswana, Kenya, Tanzania, Zimbabwe, Eswatini and South Africa.
Mozambique distribution:	M
Growth form(s):
Endemic status:
Red data list status:
Insects associated with this species:
Spot characters:	Display spot characters for this species
Literature:	Chapano, C. & Mugarisanwa, N.H. (2003). Plants of the Matobo District National Herbarium and Botanic Garden, Zimbabwe Page 28. As Pachycarpus concolor Goyder, D.J. (1998). A revision of Pachycarpus E. Mey. in tropical Africa with notes on the genus in southern Africa Kew Bulletin 53 Pages 351 - 355. (Includes a picture). Goyder, D.J., Gilbert, M.G. & Venter, H.J.T. (2020). Apocynaceae (Part 2) Flora Zambesiaca 7(2) Pages 307 - 309. (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 21. Setshogo, M.P. (2005). Preliminary checklist of the plants of Botswana. Sabonet Report no. 37. Sabonet, Pretoria and Gaborone Page 28. as Pachycarpus concolor

Other sources of information about Pachycarpus concolor subsp. concolor:

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Flora of Botswana: Pachycarpus concolor subsp. concolor
Flora of Zimbabwe: Pachycarpus concolor subsp. concolor

External websites:

African Plants: A Photo Guide (Senckenberg): Pachycarpus concolor
BHL (Biodiversity Heritage Library): Pachycarpus concolor
EOL (Encyclopedia of Life): Pachycarpus concolor
GBIF (Global Biodiversity Information Facility): Pachycarpus concolor
Google: Web - Images - Scholar
iNaturalist: Pachycarpus concolor
IPNI (International Plant Names Index): Pachycarpus concolor
JSTOR Plant Science: Pachycarpus concolor
Mansfeld World Database of Agricultural and Horticultural Crops: Pachycarpus concolor
Plants of the World Online: Pachycarpus concolor
Tropicos: Pachycarpus concolor
Wikipedia: Pachycarpus concolor