Compilation
Adiantum cuneatum

39 Images see all

Previous
Next

Name

Identification
Adiantum cuneatum Langsd. & Fisch. [family POLYPODIACEAE ] Verified by Not on sheet., Adiantum raddianum C.Presl [family POLYPODIACEAE ] (stored under name); Verified by Not on sheet.,
Related name
  • Adiantum cuneatiforme
  • Lindsaea trichomanoides
  • Adiantum fragile
  • Adiantum concinnum
  • Asplenium cuneatum
  • Adiantum andicola
  • Adiantum raddianum
  • Adiantum cuneatum

Flora

Entry for ADIANTUM raddianum C. Presl [family ADIANTACEAE]
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, (2002) Author: BERNARD VERDCOURT
Names
ADIANTUM raddianum C. Presl [family ADIANTACEAE], Tent. Pterid.: 158 (1836) & in Abh. Königl. Böhm. Ges. Wiss. IV, 5: 158 (1837); Verdc. in Journ. E. Afr. Nat. Hist. Soc. 24: 73 (1964); Schelpe in Contr. Bolus Herb. 1: 57 (1969) & F.Z., Pterid.: 113 (1970); Lye in Uganda Journ. 34: ;72, fig. 4/d, e (1970); Faden in U.K.W.F. 33, 42 (fig.) (1974); Schelpe & M.A. Diniz, Fl. Moçamb., Pterid.: 112 (1979); W. Jacobsen, Ferns S. Afr.: 232, fig. 165, map 57 (1983); Schelpe & N.C. Anthony, F.S.A., Pterid.: 103, map 82 (1986); J.E. Burrows, S. Afr. Ferns: 126, t. 19/4, figs. 127, 127a, b, map (1990); Schippers in Fern Gaz. 14: 183 (1993); Faden in U.K.W.F. ed.2: 19, t. 170 (1994). Type: S Brazil, Ilha de Santa Catarina, Langsdorff s.n. (LE, holo., BM, iso.)
ADIANTUM cuneatum Langsd. & Fisch. [family ADIANTACEAE], Ic. Fil.: 23, t. 26 (1810); Willd., Sp. Pl., ed. 4, 5: 450 (1810); Raddi, Pl. Bras. Nov. Gen.-Cogn.: 59, t. 78/2 (1925); Verdc. in Journ. E.A. Nat. Hist. Soc. 24: 39, fig. 3d (1962), non Forst. (1786). Type as for A. raddianum
Information
Rhizome short creeping, much branched, slender; scales brown, broadly lanceolate, 1.5 mm long, entire. Fronds tufted, erect or pendulous, 15–50 cm tall, 3–4-pinnate, irregularly or dichotomously arranged; stipe and rhachis dark brown, glabrous; pinnules typically obtriangular, 5–10 mm long, 4–12 mm wide, cuneate at the base but in cultivars exceedingly varied in shape and size (see note), crenate-serrate, glabrous; pinnule-stalklets brown, 1–3 mm long, glabrous. Sori round or kidney-shaped, situated in the marginal sinuses, 1.5 mm wide. Fig. 13/7 (p. 51).
Range
DISTR. U 4; K 4; T 1 (fide de Boer), 3 Malawi, Mozambique, Zimbabwe, South Africa, Ascencion Is., St. Helena; originally described from Brazil, now widely naturalised
Altitude range
900–1550 m
Distribution
KENYA South Nyeri District near Chania Falls, 19 Oct. 1968, Faden 68/765 & S & E of Chania R., W of the Nairobi–Muranga road, about 1.6 km upstream from Chania Falls, 6 Dec. 1968, Faden 68/849TANZANIA Lushoto District E Usambaras, Amani, Mt. Bomole, 30 June 1950, Verdcourt 276! & Amani, 9 Apr. 1971, Faulkner 4567! & W Usambaras, near Lushoto, Jaegertal, 18 Jan. 1966, Archbold 660!UGANDA Mengo District Entebbe, Katabi [Kitabe], Feb. 1936, Chandler 1574! & Kampala, Aug. 1937, Chandler 1834! & Mulago Hill, Kyadona, 17 Nov. 1985, Rwaburindore 2139!
Notes
This species has been extensively cultivated and numerous very distinctive cultivars are available, many morphologically quite distinct from the typical form. An account of these is given in C.J. Goudey ‘Maidenhair Ferns in Cultivation’: 128–259 (1985). Possibly some of these are in cultivation in E Africa but only one is found as an escape, namely A. raddianum c.v. weigandii (= A. weigandii Moore in Gardn. Chron. II, 20: 748 (1883), Verdc. in Journ. E.A. Nat. Hist. Soc. 24: 39 (1962). Type: obtained from Mr Weigand of Long Island N.Y. and exhibited by Messrs. Veitch at R.H.S., 9 Oct. 1883, (K!, holo.)). This bears close resemblance to the deeply incised forms of A. capillus-veneris but the rounded sori placed in the sinuses distinguish it. A. sp. aff. A. weigandii Moore listed by Schippers (Fern Gaz. 14: 183 (1993)) is presumably this. The following material has been seen – Kenya, Thika, Thika R., Feb. 1949, H.D. van Someren 231!; Tanzania, Lushoto District, E Usambara Mts, Derema, 18 Apr. 1950, Verdcourt 157!; E. Usambara Mts, Jan. 1914, Peter 280! & May 1916, Peter 16805! (both these are wrongly cited as A. capillus-veneris in F.D.-O.A: 44 (1929)) & Amani, 14 Sept. 1929, Glynne 220! & Pangani District: Kumbamtoni, 20 Aug. 1955, Tanner 2447! Fronds much like c.v. weigandii occur on plants otherwise similar to typical A. raddianum (e.g. Amani, 16 Sept. 1929, Glynne 234! & 16 Jan. 1950, Verdcourt 41!) and since the earliest introduction seems to be of c.v. weigandii the presence of the typical form may be due to reversion.

Related Materials