Excerpt from Catalogue of the African Plants, Vol. 3: Collected by Dr. Friedrich Welwitsch in 1853-61
Huilla. - A perennial herb, 3 to 5 ft. high; stem ascending or erect, fistular, hexagonal; leaves opposite, remarkably polymorphous, the lowest ones undivided, the middle ones pinnatifid, the highest ones linear with 1 or 2 teeth at the base on each side or lanceolate and not toothed; the white-flowered heads terminal, globose-hemispherical, not depressed, on very long peduncles; leaves of the involucre numerous, rounded-obtuse at the apex, rather rugose on the back, densely ciliolate on the margin; paleae of the receptacle elongateobovate, concave, abruptly acuminate at the apex, half-embracing the involucel which is tetragonal densely hirsute furrowed on the inner face and crowned with 4 large more or less purpurascent teeth; calyx(which perhaps might be regarded as a metamorphosis of the disk) -tube adnate to the ovary, constricted below the circular patelliform limb, crenulate on the margin with several erect more or less purpurascent teeth, densely shaggy inside; corolla white, tubular, the limb 4-cleft with obovate-spathulate subequal spreading segments shaggy outside with white hairs, the tube white-hairy on both sides; stamens 4, 1 to 3 of them sterile, white, far exserted; ovary inferior (or superior, if the involucel is considered to be a calyx and the calyx a modified disk), 1-celled, 1-ovuled ;style filiform, white; stigmas various in the same head, sometimes linguiform, in other cases bifid with the lobes either equal or one much shorter than the other. In marshy places among tall grasses along the banks of streams at an elevation of 5000 ft., near Lopollo, abundant; fl.26 March and April 1860. No.522.
2. Scabiosa Tourn., L.; Benth. Hook. f.Gen. Pi. ii. p.159.
1. S.Columbaria L.Sp. Pl, edit. i. p. 99 (1753); Hiern in Oliv. Fl. Trop. Afr. iii. p.252.
Huilla. - Flowers in the living state violet-skyblue, soon turning pale and whitish-yellow. In wooded meadows with short herbage between Mumpulla and Nene; fl. Oct.1859. Seen nowhere else except about Lopollo. One of the innumerable forms of this species. No. 520. In wooded meadows about Lopollo, near Catumba and by the lake of Ivantala ;fl. Dec. 1859; fr. Feb. 1860. No. 521. LXXI. Composite.
Welwitsch considered that in his herbarium from Angola proper, the proportion of Composite to the phanerogamic vegetation, as expressed in the number of species, was about a sixteenth part; whereas Robert Brown in the appendix to Tuckey's Expedition stated, p.445, that in the herbarium from the Congo Composite formed only one twenty-third part.
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