Bornmuellerantha aucheri
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Bornmuellerantha aucheri is a semi-parasitic plant species fromthe summer root family (Orobanchaceae). It is one of two species in the genus Bornmuellerantha . It is closely related to the genus of the tooth rusts ( Odontites ) and is occasionally assigned to them.
description
Vegetative characteristics
Bornmuellerantha alsoeri is an annual , upright plant that reaches heights of 8 to 35 cm (rarely up to 45 cm). It is unbranched or only slightly branched and covered with rough trichomes . The stem has a diameter of up to 2.3 mm at the base. The vegetative part of the plant consists of eight to 16 nodes , from which the top two to ten nodes can have side shoots up to 15 cm long. The side shoots are at an angle of 35 to 60 °.
The leaves are linear or linear-lanceolate in shape, have a length of 12 to 27 mm and a width of 1 to 2.6 mm. They have entire margins and are densely hairy on both sides.
Inflorescences and flowers
The racemose inflorescences consist of eight to fourteen loosely arranged flowers and are 2 to 4 cm long. The bracts are leaf-like-scaly, narrowly ovate-lanceolate, with entire margins and densely hairy with bristles on both sides. The lower bracts are 5.5 to 10 mm × 1.2 to 1.5 mm in size. The zone of inhibition between the vegetative shoot and the inflorescence consists of two to eight nodes. When the fruit ripens, the inflorescence of the main axis extends to a length of 15 cm, the inflorescence of the side shoots lengthen to 7 cm.
The self-fertilizing ( autogamous ) flowers are 7.5 to 10.5 mm long. At the beginning of the flowering period, the calyx is 6.2 to 7.3 mm long, on the fruit it is elongated to 8.5 mm. The sepals are half or a little less fused together, they are hairy with dense bristles and sparsely to copiously covered with stalk glands, the head of which is ellipsoidally shaped and consists of a maximum of 60 cells. The calyx lobes are narrow triangular. The crown is colored yellow, the approximately 5.5 to 7 mm long corolla tube is hairless. The upper and lower lip are covered with about 1 mm long, non-glandular trichomes. At 2 to 3.2 mm, the upper lip is roughly the same length as the lower lip and has a deep border. The lower lip is divided into three lobes almost to the base; the central lobe is spatulate, about as long as it is wide, clearly heart-shaped and narrowed downwards in a wedge shape. The two lateral tips are only slightly shorter, but a little wider than long and only slightly edged.
The four stamens do not or only slightly protrude from the crown and are completely hairless. The top pair is 2.2 to 2.5 mm long and the bottom pair is 2.7 to 3.2 mm long. The anthers are yellow or light brown in color, 1.2 to 1.5 mm long and are rotated by about 130 ° in relation to the stamens . The counters tear open along the entire length and do not have a spike tip at either end. The pollen grains range in size from 47.6 to 52 µm. The ovary forms five or six in each of the two compartments ovary ovules from, the stylus is up to 6 mm long.
Fruits and seeds
The fruits are narrow, obovate capsules that are not or only slightly sanded. They become 6 to 9 mm long and 2.5 to 4.2 mm wide. The seeds are 1.4 to 1.6 mm × 0.7 to 0.9 mm in size.
Chromosome number
The number of chromosomes is 2n = 24.
Occurrence and locations
The species occurs in large parts of Turkey , but is absent there in the northern and western parts. It can also be found in Armenia , the north and northwest of Iran , northwest Syria and Lebanon .
It grows in montane subalpine locations at altitudes between 850 and 3250 m on rocky limestone or slate slopes, shallow, stony pastures, steppe lawns and in sunny bushes.
Botanical history and systematics
The species was first described in 1844 by Pierre Edmond Boissier as Odontites aucheri . In 1943 the species was moved to the newly described genus Bornmuellerantha by Werner Rothmaler . This classification was confirmed by Markus Bolliger in his monograph on the genus Odontites in 1996 , he distinguishes the genus from the tooth rusts primarily through the morphology of the pollen, the trichomes and the flower. In this monograph, Bolliger also selects a copy collected by Pierre Martin Rémi Aucher-Éloy as the lectotype . By describing a second species, the genus Bornmuellerantha is no longer monotypical since 2010.
The genus name is derived from the name of the German botanist Joseph Friedrich Nicolaus Bornmüller (1862 - 1948) and from the Greek ἄνϑος (= flower), the type epithet honors Pierre Martin Rémi Aucher-Éloy .
literature
- Markus Bolliger: Monograph of the genus Odontites (Scrophulariaceae) and the related genera Macrosyringion, Odontitella, Bornmuellerantha and Bartsiella . In: Willdenowia: Annals of the Botanic Garden and Botanical Museum Berlin-Dahlem , Volume 26, 1996. Pages 37-168, (online).
- Werner Rothmaler: The split of Odontites Hall. ex. Tin. In: Communications of the Thuringian Botanical Association, New Series , Issue 50: Festschrift for the 80th birthday of Joseph Bornmüller . Verlag Gebr. Knabe KG, Weimar, 1943. Pages 224-230.
Individual evidence
- ↑ Bornmuellerantha aucheri at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
- ^ Ali A. Dönmez: Bornmuellerantha alshehbaziana (Orobanchaceae), a New Species from Turkey . In: Novon 20: 265-267 DOI: 10.3417 / 2008110
- ↑ Lotte Burkhardt: Directory of eponymous plant names . Extended Edition. Botanic Garden and Botanical Museum Berlin, Free University Berlin Berlin 2018. [1]