Petunia bajeensis
| Petunia bajeensis | ||||||||||||
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| Petunia bajeensis | ||||||||||||
| T.Ando & Hashim. |
Petunia bajeensis is a plant 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 bajeensis is a perennial (but probably only short-lived) herbaceous plant that is 20 to 40 cm high and up to 1 m wide. The almost straight stems are up to 5 mm thick. The main stem is erect to ascending. The lateral stems arise from the base of the main stem, are ascending and usually forked at the first knot where a flower stands. The stems are densely glandular-tomentose with white, twisted, approximately 1 mm long trichomes . The leaves are pointed to wedge-shaped at the base, pointed to blunt to the front. The surface has sparsely to densely glandular-tomentose hair, often ciliate, the central rib is densely glandular-tomentose hair. The lower leaves are elongated to elliptical or, rarely, lanceolate elongated to ovate. Their length is usually 40 to 65 (rarely 30 to 75) mm, their width 14 to 28 (rarely 11 to 33) mm. The upper leaves are somewhat smaller and elongated linearly.
The flowers stand on a densely glandular, tomentose-haired peduncle that is 11 to 21 (rarely 7 to 26) mm in length. The calyx is divided up to 2 to 3 mm above the base into five linear, 10 to 15 (rarely 8 to 19) mm long and 1 to 2 (rarely up to 3.2) mm wide calyx lobes. These are rounded at the tip and have dense glandular-tomentose hair on both sides. The crown is altogether (rarely only 33 to) 35 to 48 mm long, of which the funnel-shaped corolla tube makes a length of 20 to 28 mm. It is clearly indented on the lower side towards the crown throat, so that it is kidney-shaped in cross-section and urn-shaped when viewed from the side. The inside of the corolla tube is hairless and pale purple with dark purple stripes and veins on the upper side. The outside is reddish purple and hairy glandular-tomentose. The coronet is divided into five light reddish purple corolla lobes. These are circular to triangular and pointed to spiky towards the front, but occasionally also rounded.
The five stamens come in three sizes: two long, two medium-sized, and one short. The stamens are hairless and set at the base of the corolla tube, the longest reach a length of 15 to 19 (rarely up to 21) mm. In the upper area they are slightly bent inwards. The anthers of the longer stamens are 1 to 3 mm apart. The opened anthers have flat to slightly bent back flaps and are aligned so that the pollen-bearing sides are facing each other. The stamp is 13 to 17 mm long. The ovary is egg-shaped, the stylus is hairless and bent in the upper part upward. The slightly bilobed stigma stands between the anthers of the long and middle stamens.
On the fruit, the stalk extends to 13 to 33 (rarely 11 to 43) mm and is strongly bent back, the calyx lobes elongate and are bent back. The capsule is egg-shaped to spherical and prickly, it is 5 to 7 (rarely up to 9) mm long and thus reaches 1/3 to 1/2 the length of the calyx. The fine seeds are spherical and measure 0.5 to 0.7 mm in diameter.
The number of chromosomes is 2n = 14.
Occurrence and locations
The species is endemic to the mountains in the south of the Brazilian state of Rio Grande do Sul . It occurs there mainly in the area of the municipality of Bajé , but also in the area of the municipality of Lacras do Sul . The areas are at an altitude of around 200 m and are characterized by slightly hilly grasslands. The locations are mostly to be found on open, disturbed slopes at roadsides, where Petunia bajeensis grows as a pioneer plant .
Botanical history
Petunia bajeensis was first described by Toshio Ando and Goro Hashimoto in 1998 . The type epithet is derived from the name of the type locality in the municipality of Bajé .
literature
- Toshio Ando and Goro Hashimoto: Two New Species of Petunia (Solanaceae) from Southern Rio Grande do Sul, Brazil . In: Brittonia , Volume 50, Number 4, 1998. pp. 483-492.