Trompettia
| Trompettia | |
|---|---|
| Scientific classification | |
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| (unranked): | |
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| Genus: | Trompettia J.Dupin
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| Species: | T. cardenasiana
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| Binomial name | |
| Trompettia cardenasiana (Hunz.) J.Dupin
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| Synonyms | |
Trompettia cardenasiana is a spiny shrub bearing very small leaves (0.35-0.5 x 0.1-0.12 cm),[1] a yellow trumpet-shaped campanulate flower, measuring some 3 cm long and globose fruit. The growth habit is somewhat reminiscent of certain Lycium species. It is endemic to Bolivia, growing in dry, Andean valleys at altitudes of 2,000–2,500 m and 3,000–3,500 m and has been collected near the town of Cotagaita in Potosí Department.
The species was originally described in Iochroma but subsequent research revealed that, far from being a species of Iochroma, it did not even belong in tribe Physaleae (to which Iochroma belongs), constituting instead a monotypic genus in tribe Datureae most closely related to the genera Datura and Brugmansia.[2] The genus Trompettia was eventually created to accommodate the species.[3]
The specific name 'cardenasianum' commemorates eminent Bolivian scientist Martín Cárdenas (1899–1973).
Genus Name
The generic name Trompettia from the French trompette, diminutive of trompe (horn), alludes to the flowers, which are shaped like small trumpets.
Description
Woody shrubs to 2 m tall. Stems erect but arching towards apices, many of these becoming spiny, older portions glabrous, becoming pubescent towards younger portions of stem, trichomes simple, < 0.25 mm, the internodes 4-35 mm long. Spines 3-8 cm, 0.2-0.3 mm in diameter at base. Leaves borne in clusters (Fig. 5A) on very short shoots (these < 1 mm long), subtended by dense protrusions of trichomes, on short petioles to 5 mm long, these pubescent with short eglandular trichomes or glabrous, the blades simple, alternate, narrowly obelliptic to narrowly elliptic, 20-50 × 3-10 mm, (2-)4.7 to 7.5 times longer than wide, the bases attenuate, the apices broadly acute to obtuse, the margins entire, both surfaces covered by glandular trichomes (these seeming to result in black spots on pressed specimens) with occasional sparse simple trichomes along midrib of abaxial surface. Flowers solitary in leaf axils, on pedicels to 6 mm long, pubescent with eglandular trichomes, pendant. Calyces 9-12 mm long at anthesis, the tubes 5-6 × 4-5 mm, light green, the lobes subulate, 5-6 mm long, pubescent adaxi- ally, slightly accrescent during fruit maturation and eventu- ally splitting along longitudinal axis to expose mature fruit. Corollas infundibuliform (these more tubular just before anthesis), 30-35 mm long including lobes and 12-17 mm wide at the mouth, yellow ( paler at base, becoming more vibrant towards apex ), the lobes 2-4 × 7-10 mm, primary lobe veins extending into acuminate tip, external surfaces pubescent with uniformly distributed short, eglandular trichomes. Stamens 5, the filaments 22-25 mm, adnate to the basal 5-8 mm of the anther.
References
- ^ Hunziker, Armando T. (2001). The Genera of Solanaceae. Ruggell, Liechtenstein: A.R.G. Gantner Verlag K.G. ISBN 3-904144-77-4.
- ^ De Witt Smith, Stacey; Baum, David A. (August 2006). "Phylogenetics of the florally diverse Andean clade Iochrominae (Solanaceae)". American Journal of Botany. 93 (8): 1140–53. doi:10.3732/ajb.93.8.1140.
- ^ Dupin, Julia; Smith, Stacey D. (2017). "Phylogenetics of Datureae (Solanaceae), including description of the new genus Trompettia and re-circumscription of the tribe". Taxon. 67 (2): 359–375. doi:10.12705/672.6.
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