Haplocarpha rueppellii (Sch.Bip.) Beauverd

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Haplocarpha rueppellii is a very low to low (1–8 cm high) perennial plant with a ground rosette of entire leaves and short-stemmed, yellow flowerheads, that contain both ray and disc florets, and is assigned to the family Asteraceae. The species is an endemic of the highlands of Ethiopia and eastern Africa.

Description

Haplocarpha rueppellii is a creeping perennial plant that can grow into dense mats.

Roots, stems and leaves

There are many thick, almost tuberous roots, emerging from a rootstock of 1–2 cm in diameter creeping at the soil surface. The shiny, somewhat fleshy green leaves have a short leaf stalk that may have spiderweb-like hairs at their base. The leaf blade varies between almost round, ovate, or longish, diamond or inverted egg-shaped, 2–13 cm long, 1–7.5 cm wide, with the base gradually narrowing, rounded or hart-shaped, the margin entire to scalloped, with shallow irregular teeth, saw-shaped or almost lobed, the leaf tip pointy, blunt or rounded and the teeth may be ending in a soft spine. The upper leaf surface with few or may hairs or even hairy like a spiderweb, the lower leaf surface with densely felty beneath with spiderweb hairs.

Inflorescences

The stalk of the flowerhead is pinkish in color, somewhat flattened, with shallow wings, 1–11 cm long, widest at the clasping base, up to 8 mm wide. Usually every rosette carries several slender, felty, pinkish, leafless, erect scapes of up to 13 cm, sometimes swollen beneath the single flower head. Each flowerhead is 1.5–5 cm in diameter. The involucre consists of two or three, sometimes four worls of linear to narrowly ovate or inverted egg-shaped bracts, each 4–12 mm long and 1–3 mm wide, with papery margins, covered with many of few hairs. The common base of the florets (called receptacle) is 3–4 mm across, has the shape of a shallow, slightly hollowed dome, which may or may not carry a scale at the foot of each floret.

Florets

Along the outside are eight to sixteen spreading yellow ray florets, which are ovate, elliptic or egg-shaped, although about one eighth is tube-shaped. Each ray floret is 1–2.5 cm long, 2–6 mm wide, entire or sometimes with mostly one to three teeth at the tip and mostly four or five veins, hairless or with scattered multicellular hairs on the lower surface. In the centre of the flowerhead are mostly between twenty and forty (sometimes as few as eleven) yellow and urn-shaped disk florets, of 3.5–7 mm long, which divide into five triangular lobes, one third of the length of the floret, that spread or bend down, and do not have hair.

Fruits and seeds

The one-seeded indehiscent fruits are not embedded in the common base of the florets receptacle, is inverted cone-shaped or oblong, has three or four ribs, is at least 3 mm long, and half as wide, with a smooth surface or with tiny wrinkles and hairless. At the tip is one row of scales (the pappus) of 0.5–1 mm long, that are free in the outer florets, but merged at their foot in disc florets. These scales are split into twelve to fifteen standing, awl-shaped lobes, with a long, narrow tip, divided in side-lobes and without hair.

 

Haplocarpha rueppelii - Wikipedia

 

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