Ipomoea electrina
| Ipomoea electrina | ||||||||||||
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| Scientific name | ||||||||||||
| Ipomoea electrina | ||||||||||||
| DFAustin & JAMcDonald |
Ipomoea Electrina is a plant type from the genus of Morningglory ( Ipomoea ) from the family of wind plants (Convolvulaceae). The species is common in Mexico .
description
Ipomoea Electrina is a perennial , herbaceous plant , woody whose base. The stems can reach a length of two to three meters, they are densely or sparsely hairy. The egg-shaped leaves are 4 to 9 cm long and 2.5 to 7 cm wide. The upper side of the leaf is finely hairy, the base is heart-shaped, the tip is pointed.
The inflorescences are dichasial cymes with three to 18 flowers . The flower stalks are 1.5 to 4 (rarely up to 10) cm long and hairy like the leaves. The sepals are of unequal length, the outer are 5 to 6 mm long and pointed towards the front, the inner are 6.6 to 8.5 mm long and rounded. They are leathery and often warty, at least at the base. The crown has a diameter of 5 to 6.5 cm, it is yellow or orange-gold colored and plate-shaped. The corolla tube has a size of 3.5 to 4 × 4 to 6 mm. The coronet is set with five linear corolla lobes and has a length of 1.5 to 2.3 mm. The stamens are more than 5 mm above the crown.
Fruits were only observed immature, there are conical, two-chamber, vierklappige capsules , the dark brown, with long, brown trichomes occupied seeds contain.
Occurrence and locations
The species is endemic to Mexico and grows there at altitudes between 700 and 2100 m in medium-warm and medium-dry pine forests, as well as oak and other deciduous forests.
Systematics and botanical history
Within the genus of morning glories ( Ipomoea ), Ipomoea electrina is classified in the section Eriospermum and there is close to the species Ipomoea conzattii .
The species was first described in 1908 by Homer D. House as Exogonium luteum . The genus Exogonium , which was traditionally carried close to the morning glory ( Ipomoea ), is no longer recognized in current systematics and is seen as part of the morning glory. Since a different species than Ipomoea lutea was already described by William Botting Hemsley in 1879 , this name could no longer be used when the Exogonium was incorporated into the genus of morning glories .
After some invalid names were published for the species from 1978, Daniel F. Austin and J. Andrew McDonald chose the name Ipomoea electrina in 2002 , the epithet of which is derived from the amber-colored crowns of the species.
swell
- Daniel F. Austin and J. Andrew McDonald: Ipomoea electrina (Convolvulaceae): A New Name for Exogonium luteum House . In: Taxon , Vol. 12, 2002. pp. 27-30.