Tetradenia galpinii (Phillipson & C. Steyn, 2008)

Phillipson, Peter B. & Steyn, Catherine F., 2008, Tetradenia (Lamiaceae) in Africa: new species and new combinations, Adansonia (3) 30 (1), pp. 177-196 : 184-187

5. Tetradenia galpinii

(N.E.Br.) Phillipson & C.Steyn, comb. nov. Iboza galpini N.E.Br. , in Thiselton-Dyer (ed.), Flora Capensis v. I. 300 (1910). — Type: South Africa. Barberton , Dry hillsides, VI-VII.1890, Galpin, E. 972

(holo-, K!; iso-, GRA [3 sheets]!, NBG!, PRE [2 sheets]!, SAM!, SRGH!).

Tetradenia riparia (Hochst.) Codd sensu Codd, Bothalia 14 (2): 181 (1983); Flora of Southern Africa 28: 114 (1985) pro parte.

SELECTED REPRESENTATIVE MATERIAL. — Malawi. Nchisi Mountain , 29.VII.1946, Brass 17018 ( K, MO) . — Central Region, Ntchisi district, Ntchisi Forest Reserve , 19.VI.1970, Brummitt 11556 ( K) . — Northern Region, Chitipa district, N end of Nyika Plateau and adjacent area, southern slopes of Kawozya , 10.VIII.1972, Brummitt & Synge WC 188 ( K) . — Without locality, Buchanan 221 (P). — Dedja Mt. , 10.IX.1929, Burtt Davy 1561 ( K) . — Dedza district, 10.IX.1929, Burtt Davy 1546 ( K) . — Southern Region, Mt. Mulanje, foot Esperanza Estate , 21.VIII.1986, Chapman 7994 ( K, MO) , without locality, 23.V.1919, Johnson s.n. ( K) . — Lilongwe district, 20.IX.1985, Patel & Kwatha 2709 ( K, MO) . — N Prov., Rumpi district S Rukuru bridge, Njakwa gorge, 17.VII.1969, Pawek 2557 ( K) . — Chikwawa escarpment, 20.VIII.1976, Pawek 11637 ( K, MO) . — N Prov. Mzumba district Mzumba River , 31.VIII.1970, Pawek 3713 ( K) . — N Prov., Chitipa district Sokora Rd. Misuku Hills 8 miles N of Kalenge drift, 14.IX.1977, Pawek 13047 ( K, MO) . — 15 miles SW of Mzuzu , 17.X.1977, Pawek 13130 ( K, MO) . — Mzimba district, Chikangawa , 9.X.1977, Phillips 2991B ( K, MO) . — 15.III.1905, Sharpe 47 ( K) . — Without locality, X.1887, unknown ( K) . — Cultivated at NYBG, 29.IV.1905, Vernay s.n. ( K) . — Cultivated at NYBG, 29.IV.1905, Vernay s.n. ( K [3 sheets]). — Tanganyika Plateau, s.n. ( K) , 19.VIII.1949, Wiehe 225 ( K) .

Mozambique. Maputo, Namaacha, Mt. Ponduini, 25.VII.1980, Schafer 7207 ( K, MO). — Lijamanji, Nyassa district , 1.IX.1931, Sousas 747 ( K) .

Namibia. Ruacana Falls , 23.VII.1976, Leistner & Oliver 322 ( K, MO) .

South Africa. Lowveld Botanic Garden, 30.VI.1970, Buitendag 593 ( PRE, NBG) . — 7.VI.1974, Buitendag 1047 ( K, NBG, PRE) . — Nelspruit district , Malelane at Kruger National Park, 2500 m, 25.II.1949, Codd 5279 ( PRE) . — Soutpansberg, 20.VIII.1955, Codd 8398 ( K) . — Transvaal, mountains near Barberton, 1220 m, 26.VII.1947, Compton 19782 ( NBG) . — Farm Kaalbooi, Joubertspruitkloof, 1710 m, 23.III.1979, Fourie 1/7/2 ( PRE) . — Pietersburg district Duivels Kloof, 15.VII.1929, Galpin 9724 ( K) . — Zoutpansberg, 14.VII.1935, Galpin 14918 ( K, PRE) . — Environs de Louis Trichardt , Zoutpansberg, Humbert 10635 ( MO, P) . — Bois de Marovougne , Junod 1275 ( K) . — No locality, VII.1899, Junod 538 ( K) . — White River district , Lydenburg, Witklip plantation, 3400 m, 27.VII.1973, Kluge 83 ( PRU) . — Pietersburg district near Boyene, Leach s.n. ( K) . — Barberton Region , Liebenberg 2607 ( P, PRE) . — Berlin Forest Station , Drakensberg, 24.IV.1944, Mogg s.n. ( K, PRE) . — Rietvlei Farm 12 miles N of Potgietersrus, Mogg 21797 ( J) . — Waterval Boven, above the falls, Norwood Young 1646 ( J). — Erongo Mts , 28.VI.1916, Pearson 9836 ( K) . — On hills between Nylstroom & Pietersburg, 12.IX.1934, Pole-Evans 3730 ( K [2 sheets]). — Transvaal, Barberton, Rogers 22527 ( K) . — Letaba district , 6.VIII.1960, Scheepers 993 ( K) . — Zoutpansberg, 19.VIII.1955, Schlieben 7118 ( K) . — Schoemanskloof, VI.1932, Smuts 322 ( K) . — Barberton, Thorncroft 2840 ( SAM, GRA, PRE). — Barberton, VIII.1932, Williamson 73 ( PRE) . — Waterberg district , Rietspruit, on Driefontein road, N of Nylstroom, 22.XI.1966, Vahrmeyer 1457 ( PRE) . — Lydenburg district , Waterval Boven 5 Arch Bridge, 15.V.1986, Williams 3657 ( NBG) .

Swaziland. Swaziland , Mbabane , Mbeluzi Falls , 16.VII.1955, Compton 25147 ( NBG). — Swaziland, Malolotja Nature Reserve, cliff W of Malolotja Falls, 1219 m, 30.VI.1985, Heath 272 ( PRE). — Frequent along road from Stegi southwards, VII.1936, Verdoorn 1677 ( K [2 sheets]) .

Tanzania. Ulugurus, Morogoro, Bahati river , 21.X.1935, Bruce 2 ( K) . — S Highlands Prov. , 13.IX.1932, Geilinger s.n. ( K) . — S Highlands Prov. N of Lake Nyasa, 25.IX.1932, Geilinger 2619 ( K) . — Morogoro district, 3.IX.1930, Greenway 2500 ( K) . — Mbagula, Kwiro b, Mahenge, Mayer 542 ( P) . — Mwangoka 2567 ( MO, NHT) . — Ipafu , 18.IX.1971, Paget-Wilkes 963 A ( K, MO) . — Mufindi district , 18.IX.1971, Perdue & Kibuwa 11488 ( K) . — No locality, 12.X.1931, Schlieben 1342 ( K, P) . — Njombe, Iringa Prov., X.1931, Staples 195 ( K) . — Iringa district. N part of Gologolo Mts , 12.IX.1970, Thulin & Mhoro 926 ( K) . — Morogoro district, Miambo, Vaughan 2905 ( K) . — Morogoro district, 16.X.1932, Wallace 124 ( K) .

Zambia. Li district , S Province, 26.VII.1961, Angus 3042 ( K) . — Sasami River Test Herd below Sasami River Gorge, 19.V.1964, Bingham 1316 ( K, MO) . — Southern Province, Livingstone district , 29.IX.1947, Brenan & Greenway 7777 ( K) . — Chilanga fish farm, 2.VI.1963, Lusaka Natural History Club 277 ( K) . — Near Mumbwa , 25.III.1905, Macaulay 780 ( K) . — Abercorn district. Lumi River flats ( Dambo ), 17.VIII.1956, Richards 5853 ( K) . — Mapanza East , near R. Ngongo, 2.V.1953, Robinson 217 ( K) . — Kafue Basin , 9.VI.1963, van Rensburg 2288 ( K) . — Kafue Basin, Masabuka , 3.VI.1964, van Rensburg 2932 ( K) .

Zimbabwe. Zambesi River , VIII.1909, Allen 728 ( K) . — Edge of Gorge within reach of spray near the rain forest, Victoria Falls, 30.VIII.1947, Brenan & Greenway 7787 ( K) . — Umtali district Zimunya’s Reserve 18 miles from Umtali, 2 miles S of Hood’s road, 15.VI.1956, Chase 6145 ( K [2 sheets]). — Near Salisbury, Craster 202 ( K) . — Marandella , 1.VI.1924, Eyles 4403 ( K) . — Urungwe , by Nyagugutu dam, Urungwe Native Reserve, 7.V.1957, Goodier 241 ( K) . — Victoria Falls , 8.VII.1930, Hutchinson & Gillett 3448 ( K [2 sheets]). — Zambesi banks and islands near Falls, 20.III.1905, Kolbe 3142 ( K) . — Chibakwe River , Mrewa district , 16.VI.1957, Leach 8047 ( K [2 sheets]). — Inyanga district , Gaeresi River, Inyanga Downs, IX, 1956, Leach 8144 ( K) . — Martin Forest Reserve , 10 m. N of Melsetter, 31.VIII.1961, Lord Methuen 165 ( K) . — Kasipiti district Melsetter, 1.VI.1966, Loveridge 1567 ( K, MO) . — Victoria Falls , district Wankie, 9.VII.1979, Mshasha 212 ( K, MO) . — Chibi district , Iuyani Hills, 17.VI.1956, Noel 9004 ( K) . — At Timarn , Rusape district, V.1961, Plowes 2179 ( K) . — Mberengwa district , Mt Buhwa, lower NW slope, 23.VII.1973, Pope 1115 ( K) . — Near Sinoia , 21.IV.1948, Rodin 4371 ( K) . — S bank of river Zambesi near Victoria Falls, VII.1908, Rogers 5133 ( K) . — Lundi Drift , VII.1929, Smuts J.C. s.n. ( K) .

REMARKS

Tetradenia galpinii has the most extensive distribution range of all species of the genus, extending from Swaziland and the northeastern parts of South Africa, through Zimbabwe, Zambia, Malawi and into southern Tanzania, with a few records from Mozambique and an outlying population known from the Ruacana Falls in the Cunene River Valley on the Namibia-Angola border. Not surprisingly, there is considerable variation within this large range. Plants from Zambia, Malawi and Tanzania have much denser and longer indument on their stems and leaves. Specimens from around the Victoria Falls on the Zambia-Zimbabwe border are often recorded as occuring “in the spray zone”, these together with the specimen from the Ruacana Falls, are rather atypical in that the bracts are somewhat persistent. We presume that the unusual habitat is responsible for this characteristic, although further study may indicate that these specimens represent a distinct taxon.

Most species of Tetradenia can be recognised quite easily by one or two particularly distinctive features, however this is not the case with T. galpinii , which lacks clear-cut diagnostic characters.However, it can be distinguished from other members of the genus by the combination of the rather hispid indument of the leaves, which are not markedly discolorous; the shortly pedicellate flowers (male pedicels 0.5-1 mm long and the female ± 0.3 mm long); the lax male inflorescence (internodes> 4 mm long); and the calices and the lower surface of the leaves which are usually with honey-coloured or red-brown sessile glands. Tetradenia galpinii is most easily be confused with T. riparia , and critical differences between the two are discussed further under the latter.