Collections made by Rügheimer

Large tree up to 8 m high. Pods semi-circular, grey, velvety. Leaves bipinnate. Shoots with thorns. Thorns in pairs, long and straight, thin, white to grey.

Large tree with a spreading crown, 10 m high. Trunk grey, with longitudinally fissured bark. Stems yellow with hooked thorns. Thorns in pairs, bases far apart, grey with white lenticels. Leaves bipinnate. Leaflets many, glabrous, somewhat discolorous.

Annual herb, 80 cm high. Flowers white, bilabiate, calyx straight, 5 calyx tips. Leaves opposite, elliptic, sessile. Stems erect, square, hairs pointing downwards.

Tall annual grass up to 2 m high. Inflorescence fine. Culms yellow. Awns 3, glabrous, very long.

Small tree, 3.5 m high. Pods drooping, long, sausage shaped, black. Leaves compound. Leaflets alternate, obovate, apex notched. Young shoots straw-coloured.

Annual herb, 25 cm high. Flowers single, orange. Leaves compound, consisting of 4 leaflets. Stems thin, erect, hairy. Pods green, flat, sickle-shaped, covered with glandular hairs.

Small to medium-sized tree, 3-5 m high. Fruit 4-winged, apple-shaped, copper coloured to brown, wings yellowish-green. Leaves large, drooping, opposite, softly pubescent below, glabrous above.

Annual herb, 10-15 cm high. Flowers blue, spathe short and compact with a few hairs on the outside. Leaves alternate, small, elliptic, sessile, leaf lamina undulating.

Tall grass up to 1.7 m. Inflorescence digitate.

Attractive grass up to 1.7 m high. Inflorescence a dense panicle. Glumes densely stacked with no spaces in between.

Tall marshland grass with untidy inflorescence, 1.6 m high. Inflorescence fanning out and in regular intervals along the culms. Spikelets with long brown wiry awns.

Annual climber. Inflorescence in clusters. Calyx hairy. Flowers trumpet-shaped, blue, tube white. Leaves heart-shaped, sparsely hairy.

Annual succulent herb, up to 1m high. Flowers in dense terminal dichasia, tubular, orange. Stems and leaves glandular-sticky. Leaves opposite, succulent, sheathing the stem at the base.

Annual vine. Leaves sessile, palmately lobed. Fruit subglobose, orange, apex tapering into a pointed tip.

Annual herb up to 30 cm high. Stems and leaves softly pubescent. Leaves linear. Flowers small, white. Fruit immature, with 3 wings, hairy, light green.

Small grass up to 40 cm high. Inflorescence a compact panicle, fish-bone like, purple, spherical if viewed from the top.

Large tree, 8-10 m high. Leaves compound. Leaflets elliptic, opposite, petiole swollen, black.

Many-stemmed shrub up to 3 m high. Leaves palmate, dark green above, light green below. Bark grey. Flowers and fruit absent.

Grass, similar to Heteropogon contortus, but with a soft pubescent inflorescence.Spikelets with a tuft of soft woolly hairs.

Untidy shrub. Stems decussate, opposite. Leaves opposite, elliptic, hairy above and below, drooping. Buds in dense terminal clusters.

Annual grass up to 1.5 m high. Inflorescence fine. Spikelets on wiry stalks. Leaf blade smooth, hairless.

Tall marshland grass up to 3 m high. Inflorescence a long soft spike. Roots rhizomatous.