R & C -> BOTANY -> ALIEN FERNS IN HAWAI'I -> ADIANTUM 'EDWINII'
ALIEN FERNS IN HAWAI'I |
Adiantum 'Edwinii'
Still another escaped Adiantum was found by Robert Hobdy growing in two localities on Maui and one on Lana'i (Figure 1). This fern, which often covers entire cliff faces and rock slopes.has 2-3-pinnate, gracefully pendent, lanceolate to ovate-lanceolate fronds up to 1 m long and 60 cm wide. The segments, which in large specimens measure 3 x 3 cm, are obovate to rhomboid or flabellate, and the veins in the segments end in the sinuses at the margins. The pinnae bear a short-stalked, basal, acroscopic pinnule that overlaps the rachis and, in the basal pinnae, is usually two-branched. In large fronds several of the basal pinnules of the lower pinnae are pinnately divided, some with as many as five segments. This Adiantum has some characteristics in common with A. concinnum Humboldt & Bonpland ex Willdenow, but is considerably larger. This plant has been known in cultivation under the name of Adiantum 'Edwinii' (Goudey 1985; Hoshizaki 1970) , and it may be a hybrid or a cultivar of A. concinnum. It was first collected on Maui above Waikapu in1981 (Hobdy 996), and in 1986 was found growing on Maui on a cliff along 'Iao Valley Road, where it is abundant (Hobdy 2681, BISH). In 1992 Hobdy found another colony of this fern on Lana'i (Hobdy 3516 , MICH)
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