Petunia altiplana
| Petunia altiplana | ||||||||||||
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| Scientific name | ||||||||||||
| Petunia altiplana | ||||||||||||
| T.Ando & Hashim. |
Petunia altiplana is a plant type from the genus of petunia ( Petunia ) in the family of the nightshade family (Solanaceae). It is a perennial , herbaceous plant , in the south of Brazil is based.
description
Petunia altiplana is a perennial , herbaceous plant that grows prostrate, often forming mat-shaped cushions and rarely exceeding 5 cm. The stems are often branched, they are prostrate or drooping from the base. They easily form adventitious roots on older parts . They are densely hairy with glandular trichomes about 1 mm in length. The internodes are short and 2 to 15 (rarely up to 35) mm long. The main root is thick, elongated and mostly unbranched. The leaves are prostrate, broadly spatulate or occasionally inverted ovoid to circular. They reach a length of 10 to 25 (rarely up to 48) mm and a width of 5 to 15 (rarely up to 29) mm. They are sparsely hairy to hairless, only on the edges and on the underside along the midrib they are always hairy. The base is pointed, sessile or almost sessile, the tip is always rounded.
The flowers are on peduncles that are shorter than 10 mm, and are densely glandular and woolly hairy. The similarly hairy calyx is split into five linear segments up to 2 to 3 mm above the base. They are usually shorter than 10 mm, rarely they are up to 13 mm long. They are 1 to 2 mm wide and rounded at the tip, they are not or only slightly protruding. The crown is 20 to 35 (rarely up to 45) mm long, including the corolla lobes. The corolla-tube is narrow, bell-shaped, tapering to a point and 15 to 20 (rarely up to 25) mm long. The inside is pale purple or whitish except for the veins, the outside is reddish purple and finely hairy, especially along the veins. The corolla lobes are reddish purple and divided into five circular sections.
The five stamens come in three sizes: two long, two medium-sized, and one short. All stamens are longer than the calyx, they are free from the second third of the corolla tube. The stamens are hairless and attach to the base of the corolla tube. The ovary is ovoid, the pen is slim and slightly bilobed stigma is between the anthers of the middle and long stamens.
The stalk on the fruit is strongly curved and usually less than 10 mm long, rarely up to 15 mm long. The capsule is spherical and spiky. The fine seeds are inverted kidney-shaped and are 0.67-0.87 mm long.
The number of chromosomes is 2n = 14.
Occurrence and locations
The species is endemic to the highlands of the Brazilian states of Santa Catarina and Rio Grande do Sul . It is often found there in disturbed locations such as open road slopes or on sterile, stony soils with weak grass cover.
Botanical history
Petunia altiplana was first described in 1993 by Toshio Ando and Goro Hashimoto as an independent species . Previously collected specimens were mostly Petunia integrifolia subsp. depauperata , but they differ from this by the prostrate habit, the pronounced adventitious roots and the prostrate leaves. The species epithet indicates that the species can only be found in the highlands.
literature
- Toshio Ando and Goro Hashimoto: Two new species of Petunia (Solanaceae) from southern Brazil . In: Botanical Journal of the Linnean Society , Volume 111, 1993. pp. 265-280. doi : 10.1111 / j.1095-8339.1993.tb01903.x