Pachycarpus lineolatus (Decne.) Bullock

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Photo: Nicholas Wightman
Kalonde, Mpika Distr., Muchinga Province

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Synonyms:	Asclepias browniana S.Moore Asclepias conspicua N.E.Br. Asclepias inflexa S.Moore Asclepias lineolata (Decne.) Schltr. Asclepias schweinfurthii N.E.Br. Calotropis busseana K.Schum Gomphocarpus lineolatus Decne. Pachycarpus mildbraedii Bullock Pachycarpus schweinfurthii (N.E.Br.) Bullock
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Description:	Perennial herb up to 150 cm tall growing from a bundle of fusiforme (spindle-shaped) tubers; most parts hairy to pubescent; stems usually unbranched but occasionally branched at base, erect or ascending; leaves with petiole (2)5-13 mm long, blade 4-12(14) x 1-6(9) cm, narrowly lanceolate to broadly ovate, elliptic or oblong, venation prominent with numerous parallel secondary veins at right angles to the midrib; inflorescences terminal and extra-axillary with 4–12 flowers in a nodding umbel, peduncles erect or ascending, (2–)4–17 cm long; calyx lobes lanceolate, (4–)6–11 × (1–)2–3 mm, acute, green or tinged with purple particularly towards the apex and margins; corolla rotate or saucer-shaped, underside cream or brownish purple, sometimes with one or more longitudinal purple stripes, upper surface cream or pale green, often marked with a network of purple or chocolate-brown lines in the distal half, minutely papillate and with short hairs towards the apex and margins; lobes ovate, 8–17 × (4–)6–9(–11) mm, acute; corona lobes arising from the base of the staminal column, solid, fleshy, 7–8 × (1–)3–4 mm, narrowing gradually towards the apex, spreading or ascending from the staminal column, white or cream with a reddish purple patch on the underside; follicle ovoid or fusiform, usually inflated.
Notes:
Derivation of specific name:	lineolatus: marked by fine parallel lines, in reference to the secondary venation of the leaves
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Flowering time:	Dec - Feb(-Mar)
Worldwide distribution:	Widespread in Tropical Africa as far south as Namibia, Zambia and Malawi
Growth form(s):	Perennial.
Endemic status:
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Spot characters:	Display spot characters for this species
Literature:	Binns, B. (1968). A First Check List of the Herbaceous Flora of Malawi The Government Printer, Zomba, Malawi Pages 19 - 21. Also as Asclepias lineolata and Pachycarpus schweinfurthii Burrows, J.E. & Willis, C.K. (eds) (2005). Plants of the Nyika Plateau Southern African Botanical Diversity Network Report No. 31 SABONET, Pretoria Page 73. (Includes a picture). 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 343 - 348. (Includes a picture). Goyder, D.J., Gilbert, M.G. & Venter, H.J.T. (2020). Apocynaceae (Part 2) Flora Zambesiaca 7(2) Pages 304 - 306. (Includes a picture).

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Flora of Malawi: Pachycarpus lineolatus
Flora of Zambia: Pachycarpus lineolatus

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