Pedicularis dasyantha
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Pedicularis dasyantha on Svalbard |
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Pedicularis dasyantha is a species of the genus pedicularis ( pedicularis ) in the family of broomrape plants (Orobanchaceae). Like all lice herb species, it is a semi-parasite .
description
Appearance and leaf
Pedicularis dasyantha grows as a perennial herbaceous plant that does not live long and reaches heights of between 10 and 15 centimeters. It has a thick, yellow taproot that forms a few main lateral roots . The caudex is usually 0.5 to 1 (to 1.5) centimeters thick and ends in one or more rosettes . The 10 to 15 (to 20) centimeter high shoot axes are densely downy with hairy white, multicellular trichomes .
Numerous leaves are arranged alternately in the leaf rosettes . The 8 to 12 centimeters long leaves are divided into a petiole and a leaf blade. The narrow-winged petiole has about half the entire leaf length. The leaf blades, which are lanceolate to tongue-shaped in outline, are pinnate to pinnate, notched on the leaf edges or slightly to moderately lobed. The leaf blades are sparse at the tip of the blade and densely hairy towards the base of the blade.
Inflorescence and flower
The mostly 8 to 15, rarely up to 25 flowers are together in a short, dense racemose inflorescence . The flower stalk is short. The lower support leaves (bracts) are longer and the upper shorter than the flowers; they are pinnate with a broadened central rib. The stalks of the bracts are broadly winged and have up to two thirds of the total length of the bracts.
The upright flower is zygomorphic and five-fold with a double flower envelope . The five sepals are fused Roehrig. The calyx, densely hairy with long trichomes, is moderately two-lipped and ends in five blunt to pointed calyx teeth. The five dark purple to white, 12 to 20 mm long petals are fused tubular. The three-lobed lower lip and the helmet-shaped, laterally compressed upper lip are downy hairy. The side lobes of the lower lip are only sparsely hairy, especially along their edges. Both the stamens and the stigma do not protrude from the crown. Two carpels have become an ovary grown.
Fruit and seeds
The crescent-shaped capsule fruit is single-fan, opens from the tip and contains many seeds. The seeds have a white, foamy seed coat that stores water like a sponge.
Synecology
In contrast to alpine liceweed species, which have adapted to bumblebees as pollinators, Pedicularis dasyantha is likely to be dependent on other insects such as flies as pollinators due to its range .
Occurrence
The distribution area of Pedicularis dasyantha is the arctic tundra . It occurs on both Svalbard and Novaya Zemlya to the western Taimyr Peninsula .
Pedicularis dasyantha grows mostly in moderately to densely overgrown heather areas , slopes and terraces, which are often overgrown with white silver arum and square scale heather. As a semi-parasite, Pedicularis dasyantha survives only with difficulty in sparsely vegetated habitats.
Individual evidence
- ↑ a b c d e f g h Pedicularis dasyantha at Svalbards Flora , last viewed on January 14, 2012 (English, Norwegian).
