Ipomoea arborescens
Ipomoea arborescens
Ipomoea arborescens is a species of the genus of morning glories (Ipomoea ) from the family of wind plants ( Convolvulaceae ). The species is widespread in Mexico where it is known Casahuate.
Description
Ipomoea arborescens is a 5 to 15 m tall tree whose trunk can reach a diameter of up to 50 cm and a white milky sap leads. The bark is light colored. The plants are hairy feinfilzig in youth, the trichomes are usually rotated and 0.1 to 0.25 mm long. Later than the third year the plants are, however verkahlt. The leaf blades are entire, ovate to lanceolate, 9-19 cm long and 6-9 cm wide. Go from 12 to 18 secondary veins on each side of the midrib. Forward the leaves are tapered at the base, they are heart-shaped. The leaf areas are mainly on the bottom and there hairy feinfilzig to the leaf veins. The petioles are 1-9 cm long and usually hairy and feinfilzig.
The inflorescences are on or zweiblütige cymes and are terminal or axillary. They are mostly located on shortened feinfilzig hairy, serrated side shoots with a length of 1 to 14 cm. The inflorescence stems are hairy 0.3 to 1.0 cm long and feinfilzig are inflorescence stalks second order exist, they are 2-4 mm long. The non-persistent bracts reach a length of 4 to 6 mm, a width of 2 to 3 mm and are ovate - lanceolate to semi- circular, the bottom is hairy feinfilzig, the top feinfilzig or glabrous. The flower stems are 1.5 to 4.5 cm long, thickened towards the tip and in the fruit of once thicker. The sepals are ovate or occasionally semi-circular, 6-14 mm long, 6-8 mm wide. The outer sepals are equal to or slightly greater than the inner. The tip is blunt or obtuse - mucronate. The crown is white with a greenish corolla tube, 4-6 cm long and measures 4-6 cm in diameter and is slightly rotated in the bud. It is funnel-shaped, hairy feinfilzig on the outside at the tips of the petals Verwachsungsfalten ( Interplicae ) and hairy feinfilzig or silky on the edge. The stamens have a length of 25 to 40 mm, the anthers are 5-8 mm long, at the base are up to 5 mm long, drüsenspitzige trichomes. The stylus has a length of 20 to 30 mm, the lower 1 to 2 mm and resistant to thickening of the fruit. The two scars are spherical and from 2 to 2.5 mm long.
The fruits are two-chamber, vierklappige capsules, the flaps have a length of 17 to 25 mm. The seeds are hairy on the upper edges tomentose with 10 to 15 mm long trichomes.
Dissemination
The species is widespread in the western half of Mexico. It grows in open thorn forests, oak savannas and dry deciduous forests at altitudes 50-1800 m.