Primula obconica
Cup Primrose (Primula obconica )
The cups Primrose (Primula obconica ) is a Southeast and East Asian plant of the family Primulaceae ( Primulaceae ). It is trivial also called Poison primrose and as an ornamental plant widely commercially nowadays.
- 5.1 Literature
- 5.2 Notes and references
Description
Vegetative characteristics
The cup - primrose is a perennial herbaceous plant, the plant height 5-20 (rarely 1.5 to 25 ) reaches centimeters.
The standing together in a basal rosette leaves consist of a 1.5 to 14 inches long petiole with white or yellow-brown, multicellular hairs and leaf blade, respectively. This leaf blade is simple, ovate - roundish to elliptical or elongated with a length of 3 to 14 ( rarely 1.5 to 17 ) inches and a width of (rarely 1 ) from 2.5 to 11 centimeters. It is hairless on the underside or specially sparsely pilose along veins; glabrous on top, short hair fluffy or short fine. The Spreitengrund is rounded heart-shaped or occasionally; the leaf edges are either almost entire, lobed or sinuate cambered; the Spreitenspitze rounded.
Generative features
Marked with white or yellow-brown, multicellular hairs Blütenstandsschäfte can be both shorter and longer than the leaf rosette and register individual doldige inflorescences with 2-13 flowers. The 3-10 mm long bracts are linear shaped to linear - lanceolate. The 5 to 20 (rarely 1.5 to 25 ) mm long flower stems are provided with downy hairs. The hermaphrodite, radial symmetry and five petals can be both verschiedengriffelig or equal long have stylus. In long-styled flowers the stamens are close to the Kronröhrengrund; the pen almost reached the Kronschlund. In the short-styled flowers the stamens extend to the middle of the tube; the pen is 2 to 2.5 millimeters long. In the homo style, equal -styled flowers with stamens up close to the Kronröhrenspitze the stylus reaches the stamens. The verwachsenblättrige, cup-shaped to broadly bell-shaped, short fluffy or short finely hairy calyx consists of five up to 1 /4 to 1 /3 of the cup length free sepals; calyx teeth broadly triangular, ciliated and goblet tips bespitzt with water separating glands. The five pink to lavender - pink, rarely white colored petals are fused into the cup about twice the length measured corolla tube; the coronary band measures 1.5 to 2.5 inches in diameter; the Kronlappen are broadly obovate and emarginate at the top.
The cups Primrose forms of capsule fruits.
The chromosome number is 2n = 22 or 62
Occurrence
The cup - primrose is found in the central to southern Chinese provinces of Guangdong, Guangxi, Guizhou, Hubei, Hunan, Jiangxi, Sichuan, Yunnan and the Tibet Autonomous Region and is also indicated for Thailand. They colonized habitats such as thickets, forests in general, rocky sites in mountain forests and dry limestone rocks at altitudes 500-3300 m.
System
The cups Primrose was first described in 1880 by Henry Fletcher Hance. It is run in the family Primulaceae in the genus Primula subgenus Auganthus, Section Obconicolisteri.
The cup - primrose is divided into five subspecies:
- Primula obconica subsp. begoniiformis ( Petitm. ) W.W.Smith & Forrest: The petiole is thin and more or less wiry. The leaf blade is ovate - rounded to rounded, about as long as wide, with edges notched up shortly lobed. The Blütenstandsschäfte are longer than the rosette leaves and much longer than the pedicels. This subspecies is widespread as endemic in the southwestern Sichuan and western Yunnan and grows in mountain forests on rocky sites and altitudes from 1600 to 2200 meters.
- Primula obconica subsp. nigroglandulosa ( WWSmith & HRFletcher ) CMHu: The leaf blade is rounded on the bottom and densely dotted with tiny black glands. The Blütenstandsschäfte are longer than the rosette leaves and much longer than the pedicels. It is endemic in western Yunnan ( Lushui Xian, Tengchong Xian).
- Primula obconica Hance subsp. obconica: The ovate - elliptic leaf blade is dry thin paper-like. The Spreitenrand is denticulate, cambered or almost entire. It blooms from March to June. They settled shady - damp sites in thickets and forests at altitudes 500-2200 m. It is the most common subspecies and known from the Chinese provinces of Guangdong, Guangxi, Guizhou, Hubei, Hunan, Jiangxi, Sichuan and Yunnan.
- Primula obconica subsp. parva ( Balf.f. ) W.W.Smith & Forrest: The only 1.5 to 5 centimeters wide leaf blade is broadly ovate to rounded and scalloped edge to gebuchtetem. The Blütenstandsschäfte are shorter than the rosette leaves and hardly longer than the flower stems with a length of 1 to 4 centimeters. This subspecies inhabited dry limestone rocks at altitudes from 1800 to 2000 meters. It is endemic to the central Yunnan ( Huize Xian, Kunming Shi ).
- Primula obconica subsp. werringtonensis ( Forrest ) W.W.Smith & Forrest: The broadly ovate to ovate - elliptic leaf blade is membranous when dry, the edge is usually lobed briefly sinuate. This subspecies blooms from May to June. The chromosome number is 2n = 24 It comes in Auengebüschen and in open forests at altitudes 3000-3300 meters in front. It is endemic to the western Sichuan and northern Yunnan.
Use
The cup - primrose is known as a popular ornamental plant and as a flowering pot plant. It is among the primroses, which the included secretion benzoquinone primin produce with their glandular hairs, this could cause skin irritation on contact traces and allergic reactions. The course of the " Primeldermatis ", which is often observed with gardeners as an occupational disease is considered to be extremely stubborn. However, already priminfreie varieties were grown.