Tinnea gracilis Gürke

Meerts, Pierre, 2022, New identifications of Lamiaceae (Lamioideae and Scutellarioideae) from D. R. Congo, Rwanda and Burundi, Bothalia (a 9) 52 (1), pp. 1-7 : 5-6

* Tinnea gracilis Gürke

Distribution: D.R. Congo, Tanzania, Zambia.

Habitat: Miombo woodlands, especially on rocky outcrops and dry, shallow soil; alt. 1240–1500 m in D. R. Congo, elsewhere alt. 800–1850 m .

Specimens examined: D. R. CONGO: Haut-Katanga: Kitshinje , 08°24’S, 27°53’E, alt. 1400 m, forêt claire sur affleurement de quartzites, 7 May 1953, Desenfans 3116 & Desenfans 3134 ( BRLU) ; Massif de la Luina,

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± 12°00’– 12°50’S, 27°40’– 28°00’E, alt. ± 1250 m, forêt claire à Brachystegia microphylla sur conglomérat de base du Roan, 21 Jun. 1957, Duvigneaud 3614 Ti ( BRLU); Entre Welgelegen et Kasumbalesa , ± 12°08’S, 27°40’E, alt. ± 1250 m, forêt claire enrochée à Brachystegia microphylla , 29 Jan. 1960, Duvigneaud 5302 T ( BRLU); Près de Kasumbalesa, 100 km S of ‘ Elisabethville’ [Lubumbashi] , 12°12’S, 27°48’E, alt. ± 1350 m, crête rocheuse, 27 Mar. 1951, Schmitz 3517 ( BR); Environs de Kasumbalesa , ± 12°12’S, 27°48’E, forêt claire sur pente rocheuse, 20 Mar. 1971, Lisowski 23785 ( POZG); Colline à l’ouest de Kasumbalesa , ± 12°12’S, 27°48’E, alt. ± 1400 m, forêt claire, 20 Mar. 1971, Lisowski 23789 ( POZG) .

Discussion: The species was previously known from Zambia and Tanzania only. It was first identified in the collections by Paul Bamps in 1985, but that record has apparently remained unpublished. The new collections fall in two groups, i.e. a group located in the SE of Lubumbashi, quite close to the nearest Zambi- an locality (Ndola), and another one ± 400 km in the north, on the Mitwaba Plateau.

Bibliography: Robyns & Lebrun (1930), Vollesen (1975), Paton et al. (2009, 2013), Vollesen & Merrett (2020).