Tenicroa is a former genus in the Hyacinthaceae family with species native to South Africa. Many of the species in this genus have been included in many other genera in the past including: Albuca, Ornithogalum, Anthericum, Urginea, Sypharissa, Pilasia, and Phalangium. Goldblatt, Manning and Fay in A Revised Generic Synopsis of Hyacinthaceae in Sub-Saharan Africa, Based on Molecular Evidence, including New Combinations and the New Tribe Pseudoprospereae included this genus as a group in the genus Drimia. You still sometimes see these species listed under Tenicroa. Flowers are in a simple wiry raceme, anthers are exserted and filaments longer than 2.5 mm, and the leaf bases are enclosed in an elongated banded sheath in this group. Most of the short lived flowers in this group are white with green keels, often flushed purple, and fragrant.
Drimia exuviata (Jacq.) Jessop (syn. Tenicroa exuviata (Jacq.) Speta), grows on rocky slopes and flats, often in clay or granite from Namaqualand to Grahamstown. Plants range in size from 20 cm to 1 m. It differs from the other species by having leaves that are firm and leathery, erect and usually as long as the raceme. They are enclosed in a grey sheath at the base and present at flowering in spring. The fragrant flowers are white sometimes tinged pink. The first two photos taken by Christopher Whitehouse in the Phillipskop Mountain Reserve near Stanford. The last photo from the book Plants of the Klein Karoo courtesy of Jan and Anne Lise Schutte-Vlok.
Drimia filifolia (Poir.) J.C.Manning & Goldblatt (syn. Tenicroa filifolia (Poir.) Oberm.), is found on sandy slopes and flats in a wide part of the winter rainfall area of South Africa. Plants grow from 10 to 30 cm high. This species flowers spring to summer. First two photos by Cameron McMaster taken in the Komsberg, part of the Roggeveld. Third and fourth photos taken by Christopher Whitehouse in the Phillipskop Mountain Reserve near Stanford.
Drimia fragrans (Jacq.) J.C.Manning & Goldblatt (syn. Tenicroa fragrans (Jacq.) Raf.), grows on sandy flats in the northwest Cape. Plants grow 30 to 80 cm high and the leaves are wiry and enclosed in a papery neck. Flowers are in an elongated raceme with elliptical tepals.
Drimia loedolffiae van Jaarsv. is a succulent cliff dwelling Eastern Cape species named in 2006. Photo 1-2 was taken by the author, Ernst van Jaarsveld in the Bolo Reserve, Kei River. He also supplied photos 3-5 taken at the Kei River Mouth. Photo 6 by Alessandro Marinello shows the flower.
Drimia multifolia (G.J.Lewis) Jessop (syn. Tenicroa multifolia) (G.J.Lewis) Oberm. grows to about 15 cm tall and has filiform, coiled leaves. It is found on rocks and poorly drained soils from southern Namibia, Namaqualand into the western Karoo and the southwest Cape. Photos 1-2 taken by Cameron McMaster near Bredasdorp in the Overberg. Photos 3-4 taken by Andrew Harvie in the Kamiesberg in Namaqualand.
Drimia nana (Snijman) J.C.Manning & Goldblatt (syn. Tenicroa nana Snijman) has wiry leaves enclosed in a sheath and mauve flowers with green and white patches. It is found in Namaqualand and flowers in summer. At least one accession described the habitat as shady mossy ledges in the Kamiesberg. Photos 1-2 were taken by Romain Amato. Photos 3-4 were taken by Dylan Hannon.
The Drimia index includes a table with all the species in the subgroups in this genus listed by name.