Compilation
Christella chaseana

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Name

Identification
Isotype of Thelypteris chaseana Schelpe [family THELYPTERIDACEAE ] Verified by Schelpe,E., Christella chaseana (Schelpe) Holttum [family THELYPTERIDACEAE ] (stored under name);
Related name
  • Christella chaseana
  • Thelypteris chaseana

Flora

Entry for Christella chaseana (Schelpe) Holttum [family THELYPTERIDACEAE]
Herbarium
Royal Botanic Gardens, Kew (K)
Collection
Flora of Tropical East Africa
Resource Type
Reference Sources
Entry From
Flora of Tropical East Africa, page 1, (2006) Author: BERNARD VERDCOURT
Names
Christella chaseana (Schelpe) Holttum [family THELYPTERIDACEAE], in J. S. Afr. Bot. 40: 148 (1974); Schelpe & Diniz, Fl. Moçamb., Pterid.: 211 (1979); Jacobsen, Ferns S. Afr.: 392, fig. 296 (1983); Schippers in Fern Gaz. 14: 196 (1993); Faden in U.K.W.F., ed. 2: 32 (1994). Type: Namibia, Otjiwarongo District, Schelpe 4791 (BOL, holo.; BM!, iso.)
Dryopteris dentatus var. [family DRYOPTERIDACEAE], sensu Chiov., Racc. Bot. Miss. Consolata Kenia: 140 (1935) quoad Balbo 621 pro parte, non (Forssk.) C.Chr.
Thelypteris chaseana Schelpe [family THELYPTERIDACEAE], in J. S. Afr. Bot. 31: 263 (1965) & F.Z., Pterid.: 194 (1970) & Expl. Hydrobiol. Bassin L. Bangweolo & Luapula 8 (3) Ptérid.: 80 (1973) & C.F.A., Pterid.: 155 (1977); Schelpe & Anthony, F.S.A., Pterid.: 215 (1986); Burrows, S. Afr. Ferns: 265, t. 44/4, illustr. 63/270, 270a & b (1990)
Information
Rhizome creeping, with brown lanceolate acuminate entire slightly pilose scales up to 11 mm long. Fronds spaced up to 1 cm apart, 0.35–1.5 m tall. Stipe pale brown 30–63 cm long, glabrous. Lamina narrowly elliptic to lanceolate in outline, deeply bipinnatifid, 30–70 cm long, 15–40 cm wide, acuminate with a deeply pinnatifid terminal segment; sometimes up to 3 pairs of basal pinnae reduced and deflexed; middle pinnae narrowly oblong, 8–20 cm long, 1.8–2.3 cm wide, acuminate, pinnatifid into narrowly oblong lobes 5–10 mm long, 2–3.5 mm wide, sometimes falcate, obtuse; veins entirely free or contiguous, meeting in the sinus membrane, occasionally ± anastomosing. Indusia conspicuous, usually with dense long white hairs.
Range
DISTR. U 2; K 3, 4?, 7; T 2, 4, 7, 8
Altitude range
800–1900 m
Distribution
KENYA Trans-Nzoia District 7.5 km NE of Kitale, Koitobos R., Sandum’s Bridge, 12 June 1971, Faden et al. 71/456!KENYA Teita District Mbololo Hill, Mraru Ridge, 9 Apr. 1971, Faden et al. 71/243! & Taveta, Msau R. valley, 18 May 1985, Kabuye et al. T.H.E. 631!TANZANIA Arusha District near Arusha, Sokon, 2 Nov. 1955, Milne-Redhead & Taylor 7026!TANZANIA Mpanda District Kapapa, forest beyond U.T.C. sawmill, 19 Sept. 1970, Richards 25980!TANZANIA Iringa District 38 km SE of Iringa, Dabaga Highlands, Kilolo, 10 Feb. 1962, Polhill & Paulo 1430!UGANDA Toro District 3 km N of Kichwamba, 23 Sept. 1969, Faden 69/1247!
Distribution (external)
Cameroon
Congo (Kinshasa)
Angola
Zambia
Malawi
Zimbabwe
Namibia
Notes
Some of the information for this species is taken from sheets determined by Schelpe or Holttum but have field which do not describe the rhizome or have inconsistencies e.g. creeping but fronds tufted. Richards 7383 (Tanzania, Ufipa District, Sumbawanga, Kaka R.,) has been determined by Alston as Thelypteris pseudogueintziana (Bonap.) Alston, but I do not see how it differs from the above species. If they prove to be the same, then Bonaparte’s name is much the older.

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