Grabowski's blackberry
| Grabowski's blackberry | ||||||||||||
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| Rubus grabowskii | ||||||||||||
| Consecration ex Günther & al. |
Grabowski blackberry ( Rubus grabowskii ), also Grabowski blackberry , is a plant of the genus Rubus within the family of Rosaceae (Rosaceae).
description
Appearance
The Grabowski blackberry forms upright bushes . Many parts of the plant, especially in the stem axis, are prickly . Characteristic are the bald, furrowed young stem axis without stalk glands with strong, mostly curved spines, rich-flowered inflorescences with pink petals and hairy ovaries. The young shoot axis is arched to almost upright (up to 2.5 meters), angular, flat-sided with a diameter of up to 1.5 centimeters and furrowed down to the ground, almost or completely bare and without stalk glands. The spines are 5 to 10 millimeters long from a strongly widened to 10 mm long red base protruding vertically. Most are more inclined and straight or slightly curved to sickle.
leaf
The alternate leaves are arranged in a petiole and a leaf blade. The imparipinnate leaf blade contains five pinnate leaves, which often overlap at the edges. The leaflets are hand-shaped or slightly foot-shaped. The top of the leaf is bare. The underside of the leaf is light gray-green and white-gray, noticeably hairy ( trichomes ). The terminal leaflets are short stalked (25 to 35%), with a length of 15 to 20 millimeters, roundish-ovoid to obovate with a pointed upper end. The base of the leaflet is weakly heart-shaped to marginalized, rounded or truncated. The serrature of the leaflets is uniform to roughly periodic with broad, pointed main teeth. The leaf margin is coarsely wavy. The lateral leaflets and lower leaflets are stalked 1 to 4 millimeters long. There are five to nine sickle to hooked spines on the leaf stalk.
Inflorescence and flower
Many flowers stand together in the narrow, pyramidal, conical inflorescences. The leaves begin 1 to 5 centimeters below the tip, the lower ones are threefold. The inflorescence axis is densely hairy, glandless with 4 to 5 millimeters long, curved spines. The flower stalks are 5 to 20 millimeters long, with up to five uneven, curved spines and numerous subsessile glands hidden in the hair.
The hermaphroditic flowers are radial symmetry and five-fold with a double flower envelope . The calyx appears gray-green, thornless or arm prickly and turned back. The five pink petals are elongated-elliptical to rounded. The stamens are longer than the greenish style and the anthers remain bare. The ovaries are hairy at the top.
Similar species
Similar taxa are Rubus grabowskii subsp. walsemannii and Rubus montanus . Synonyms are Rubus rugicus EHL Krause , Rubus thyrsanthus (Focke) Foerster , Rubus thyrsoideus ssp. thyrsanthus Focke and Rubus thyrsoideus Wimm., nom. illegal. (nom. superfl.) .
Occurrence and endangerment
Grabowski's blackberry is widespread in southern Scandinavia and Central Europe. It occurs in southern Norway , southern Sweden , Denmark , the Netherlands , Belgium , Austria , Hungary , the Czech Republic , Slovakia , Romania , Poland and Germany . In Schleswig-Holstein it grows absent-mindedly or rarely and completely restricted to the young moraine area, which is why it is highly endangered, but it is widespread in Mecklenburg-Western Pomerania .
Grabowski's blackberry is thamnophilic and usually grows on soils rich in bases, also somewhat calcareous . Rubus grabowskii is a characteristic of the Pruno-Rubenion radulae Web. on richer Querco-Fagetea, of which in particular from Fagion forest soil types.
Systematics
The first description of Rubus grabowskii was made in 1827 by Carl Ernst August consecration in Günther & al .: Schedae centuriae Plantarum Silesiacarum Exsiccatarum , page 14. The specific epithet grabowskii honors Heinrich Emanuel Grabowski .
The species Rubus grabowskii belongs to the section of blackberries ( Rubus ) in the genus Rubus .
literature
- Rubus grabowskii in Hrsg .: Westphalian Museum of Natural History : Treatises from the Westphalian Museum of Natural History. Issue 3 (1985), Münster 1985, pp. 243-246. ISSN 0175-3495
Individual evidence
- ↑ Rubus grabowskii ssp. Rubus grabowskii Weihe - Grabowski's blackberry. Rubus, accessed May 14, 2017 . at the genus Rubus in Schleswig-Holstein, Hamburg, Mecklenburg-Western Pomerania and Lower Saxony (private website of Gerd-Uwe Kresken).
- ↑ Rubus grabowskii. http://www.regnitzflora.de , accessed on May 14, 2017 .
- ^ Flora in Germany
- ↑ Rubus grabowskii at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed August 10, 2017.
Web links
- Rubus grabowskii Weihe, Grabowski blackberry. In: FloraWeb.de.
- Profile and distribution map for Bavaria . In: Botanical Information Hub of Bavaria .
- Rubus grabowskii in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Retrieved May 23, 2017.
- Rubus grabowskii near Flora of Germany .