Oxalis gigantea Barnéoud-the largest oxalis

Origin and Habitat: Antofagasta, Atacama and Coquimbo (very common in the hills of the Valle de Elqui), Chile.
Habitat and ecology: Oxalis gigantea grows in xeric shrublands predominantly in coastal deserts where summers are dry (drought periods of 6-10 months long), and episodically the winters as well (Precipitations 100-300 mm per annum). The plants obtain water mainly from condensation. The vegetation is mostly composed of shallow-rooted cacti (Trichocereus spp., Eulychnia spp., Copiapoa spp. Eriosyce spp. etc.) and drought-deciduous shrubs. Oxalis gigantea and tall cacti often forms the most prevalent features of the vegetation. This succulent shrub is pollinated by hummingbirds.

Common Names include:
ARABIC ( لعربية ): أقصليس عملاق
SPANISH (Español): Churco, churqui

Description: As might be inferred from its specific name, Oxalis gigantea is a giant wood-sorrel, probably the largest known species of the genus. It is an extraordinary drought-deciduous shrubs that makes a large, woody bush, often so much as 1.8-2.4 m tall (occasionally 5-6 metres) and appears unique in the genus. Its erect, slightly branching stems are thickly furnished from top to bottom with short spurs, carrying rather fleshy, green leaves and countless golden blossoms. Leaves are shed whenever the conditions become arid. Depending on the rains a plant may gain and lose its leaves several times a year. Oxalis gigantea is leafless most of the year and usually remain leafless during coldest part of winter.
Stem: Slender, few branched, erect to sinuous and drooping, glandular often 2.5-5 cm in diameter (up to 7.5 cm at the base), and with numerous spur-like short shoots, at fist succulent, becoming woody with time, pale brown and minutely pubescent when young, later becoming woody and with dark grey to almost black bark.
Roots: Fibrous.
Leaves: Many, fleshy, small, 3-foliolate, very variable in size, leaflets small, 3.5-7 (rarely to 14) mm long, entire, inversely heart-shaped, fleshy, glabrous, bright shining green, hairless or sometimes pubescent;
Inflorescences: With solitary flowers or 3- to 6-flowered umbellate cymes. Pedicels to 3 cm long.
Flowers: Up to 3 cm long, 1-2.5 cm across, bright yellow. Sepals unequal, somewhat obtuse, tip pubescent, glabrous else-where. Petals oval. Stamens fused at base, 5 taller pubescent. Style pubescent. Ovary glabrous.

https://youtu.be/nO-u7NOeVdo?list=PLK8bda0Bqux1qKZYbTn6VbdSbX7E1MXfI

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