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!Gladiolus metallicola Goldblatt Search in The Plant ListSearch in IPNISearch in Australian Plant Name IndexSearch in NYBG Virtual HerbariumSearch in Muséum national d'Histoire naturelleSearch in Type Specimen Register of the U.S. National HerbariumSearch in Virtual Herbaria AustriaSearch in JSTOR Plant ScienceSearch in SEINetSearch in African Plants Database at Geneva Botanical GardenAfrican Plants, Senckenberg Photo GallerySearch in Flora do Brasil 2020Search in Reflora - Virtual HerbariumSearch in Living Collections Decrease font Increase font Restore font
 

Published In: Novon 18(2): 164–165. 2008. (22 May 2008) (Novon) Name publication detailView in BotanicusView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 1/8/2017)
Acceptance : Accepted
Taxon Profile     (Last Modified On 1/8/2017)
Description: Plants 4550 cm high; corm probably globose, ca. 15 mm in diam., tunics of dark brown, fairly fine, netted fibers; stem branched, enclosed by leaf sheaths to the base of the spike. Leaves 5 or 6, the lower 2 with well developed sublinear blades about as long as the stem, 26 mm wide in the middle, the margins and central vein heavily thickened and 2 or 3 secondary veins present between them, hyaline when dry, upper 3 or 4 leaves largely to entirely sheathing, the sheaths with membranous or dry, light brown margins. Spike secund, with 10 to 15 flowers, slightly flexuose; bracts soft-textured, pale green, becoming dry and light brown in the upper half, the outer ovate, (9)1012 mm, the inner 12 mm shorter, rounded apically or notched at the tip. Flowers pale blue-lilac, the tepals marked dark red in the midline; perianth tube obliquely funnel-shaped, ca. 10 mm; tepals unequal, the dorsal largest, ca. 16 mm long, widest in the upper third, narrowed and claw-like in the lower third, arching forward over the stamens and style, upper lateral and lower tepals joined together for 23 mm forming a lower lip, ca. 10 mm, tapering below to a narrow grooved claw ca. 3 mm; filaments arching beneath the dorsal tepal, ca. 10 mm; anthers 45 mm, evidently purple. Ovary ovoid, ca. 3 mm long; style arching over the filaments, dividing between the base and middle of the anthers, the branches spreading, ca. 2 mm. Capsules and seeds unknown. Flowering time: March and April.
Country: Zimbabwe
Distribution and ecology: known from just one gathering in northern Zimbabwe; on hills on the Great Dyke.
Diagnosis:

In general aspect, Gladiolus metallicola most closely resembles the southern African G. permeabilis and in particular, subsp. edulis. This, the most widespread member of section Hebea of Gladiolus extends from the southern tip of South Africa to Namibia and Zimbabwe, with subsp. edulis extending across summer-rainfall southern Africa and subsp. permeabilis restricted to the winter-rainfall zone in the southwest of the subcontinent. The narrow, whip-like leaf blades are a distinctive feature of G. permeabilis and other members of the immediate G. permeabilis alliance. The central vein and the central portion of the linear leaves are thickened whereas the margins are usually barely raised and secondary veins are not evident. In general, the leaf margins of most species of tht alliance are not thickened. Leaves of G. metallicola, with their thickened margins and central veins (they are hyaline and conspicuous when dry), thus stand out in section Hebea. The other distinctive feature of section Hebea are the tepals, which are typically narrowed into claws below, such that in profile one can see through the resulting gap between the narrowed tepals. G. metallicola has basally narrowed tepals and appears to conform to this windowed condition. Other identifying features of section Hebea reside in the corm tunics and capsules and seeds, lacking in the one collection of G. metallicola.

The general appearance of Gladiolus metallicola to G. permeabilis subsp. edulis is in fact superficial, for not only do the leaves differ markedly in their prominently thickened margins, but the flowers are smaller and lack the tapering attenuate tips of the tepals. Flowers of G. permeabilis subsp. edulis are cream, flushed purple outside, relatively large, with the dorsal tepal 2835 mm long and anthers 6.59 mm long. This is substantially larger than in G. metallicola, which has a dorsal tepal ca. 16 mm long and anthers 45 mm long. An odd feature of G. metallicola is the short style which divides between the base and middle of the anthers, whereas in most Gladiolus species the style reaches the tips of the anthers. Additional collections of the species are needed.


 
 
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