Compilation
Pelargonium luridum

Perennial erect herb up to 7 dm. tall, with a tuberous woody rootstock, acaulescent; vegetative parts, peduncle and pedicels glandular and pubescent with both long (± 2 mm.) patent and much shorter somewhat appressed hairs, as well as sessile glands. Leaves mostly developing after the flowering period, all radical; lamina ovate to broadly ovate in outline, (3–)7–15 (–24) cm. long, 4–14(–19) cm. wide, cuneate to cordate at the base, extremely variously dissected, shallowly lobed to pinnatisect or bipinnatisect, later leaves often more dissected; ultimate segments filiform to oblong or ovate, entire to serrate or crenate towards the apex, when entire apex acute to rounded or mucronate, densely tomentose to ± glabrous, with long patent hairs absent or sparse on many leaves and always restricted to the margins and veins; petiole 6–20(–30) cm. long; stipules linear to narrowly triangular,15–40 mm. long, 1.5–5 mm. wide, acuminate. Inflorescence a terminal simple umbel of 5–30(–50) flowers; peduncles 1–3 per plant, each 14–65 cm. long; free part of the pedicel 2–35(–50) mm. long; bracts few to numerous per pedicel, linear to lorate or lanceolate, 8–16 mm. long, 1.5–4 mm. wide, acuminate, membranous. Sepals lanceolate to narrowly ovate, 8.5–15 mm. long, 1.5–5 mm. wide, glandular and densely pubescent. Spur 3–7 cm. long. Petals 5, oblanceolate to narrowly obovate, 12–24(–28) mm. long, 5–12 mm. wide, white to pale yellow with pink venation or purple, the 3 anterior ones clawed. Stamens connate at the base for 1.8–3.5 mm.; antheriferous filaments usually 7, 4–8 mm. long; staminodes 3, 3–5.5 mm. long; anthers 1.6–3.2 mm. long, 1.2–1.7 mm. wide. Ovary tomentose at the base; rostrum pubescent; style 0.1–1.2 mm. long; stigmas 1.6–2.8 mm. long. Fruit 4–5(–6.5) cm. long; mericarps 9–15 mm. long, 1.5–3 mm. wide. Seeds 4.8–6 mm. long, 1.9–2.2 mm. wide; testa minutely reticulate, pale brown.