Cirsium × stroblii (Cirsium greimleri × spinosissimum) is a hybrid between C. greimleri and C. spinosissimum.
| Cirsium × stroblii | |
|---|---|
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Cirsium |
| Species: | C. × stroblii
|
| Binomial name | |
| Cirsium × stroblii Hayek
| |
3 herbarium specimens as of 2020.[1]
Distribution
editIt is found only in the Rottenmann and Wölz Tauern, although the range overlap extends to nearby ranges.[1]: 86
Description
editThere are few specimens, but it is close in appearance to C. heterophyllum × spinosissimum, differring in having broader leaves with short lobes, without tomentose undersides.[2]
The description of von Halácsy:[2]
Stem erect, simple until the inflorescence, especially in the upper part sparsely arachnoid, not winged. The leaves on the upper page are covered with scattered appressed hairs; on the lower leaves they are sparsely arachnoid-woolly, somewhat grayish; the lower leaves are ovate in circumference, with length twice their width, suddenly narrowed into a shorter petiole, deeply pinnately lobed with 6-7 broadly rhomboid pinnately lobed lobes, with sharp lobes emerging into a thin spine and thinly acuminate teeth; the middle and upper leaves are similar, the latter somewhat narrower and the auriculate-amplexicaul base sessile. The three or four heads are subsessile at the apex of the stem, the leaves are ovate-lanceolate, deeply acuminate-toothed or bidentate, the lower heads of which exceed about half; suffulta 2 cm long. Scales are anthode ovate-lanceolate, subpuberulous purple at the apex, the lower ones attenuated into a long spiny subpalatal tip, the upper attenuated spine unarmed. Flowers citrous, purple-suffused. It differs from C. greimleri in the stem up to the leaf inflorescence, simple, with narrower leaves less tomentose and pinnatized beneath, erect heads, supported by leaves; from C. spinosissimum with wider leaves, less strong spines, denser pubescence, from both flower colors. It hardly differs from the highly polymorphic hybrid C. × juratzkae in its wider leaves, not tomentose underneathm and its broad, short lobed leaf blades.
— Heinrich Gustav Reichenbach, Versammlung (1907)
History
editIdentified by August von Hayek in the summer of 1906 from a specimen collected on the slopes of a ravine that feeds the Großer Bösenstein lake by Gabriel Strobl in 1867.[3]
See also
editReferences
edit- ^ a b Vavrinec, Martin (2020-02-13). Geografická analýza mezidruhové hybridizace rodu Cirsium ve střední Evropě (Diplomová práce) (Thesis).
- ^ a b von Halácsy, Eugen (1907). "Versammlung am 19. Oktober 1906" (PDF). Bericht der Sektion für Botanik. 57: 14–21.
- ^ Von Hayek 1907. "Gelegentlich einer Exkursion auf den Großen Bösenstein bei Trieben (Niedere Tauern, Steiermark) im Jahre 1867 entdeckte P. Gabriel Strobl (jetzt Direktor des Gymnasiums zu Admont)
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