Tribulus terrestris  

Scientific name :

kingdom:plantae 

phylum: Magnoliophyta

Class: Magnoliopsida

Subclass:Rosidae

Order:Sapindales

Family: Zygophyllaceae

Genus: Tribulus

Sp:Tribulus terrestris L.

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Distribution: Tropical and sub-tropical regions of Asia , Europe and Africa .

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habit:annual, prostrate herb,branches 30-60 cm long biennials or perennials ,erect,diffusely branched herbs or sub shrubs stems finely striated

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Leaves:3-7 cm long larger ones with 6-8 pairs of leaflets and smaller ones with 3-5 pairs ;leaflets closely to widely spaced, 4-7 x 2.5-3.5 mm ,middle pairs usually longer than the basal and terminal pairs, subsessile elliptic-oblong appressed pubescent at the lower side, sparsely pubescent to pubescent on the upper side, sometimes pubescent on the veins only.

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inflorescences:pedicel shorter than the subtending leaf ,sepals 3-5 mm long ,ovate-lanceolate, sericeous,petals 5-7 mm long, pale yellow to yellowish,obovate. Stamens usually 10,5-8 in one variety ovary stigose,grooved ; style very short or absent; stigma linear to capitate.

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Flower:solitary,bisexual,radial pedicellate at the axils of smaller leaves ebracteate ,0.5-1.3 cm wide;stamens usually 10; fruit 1-1.5cm wide including spines; tubercled, glabrous or pubescent; spines usually 4 in each mericarp (2 long median and 2 short basal); sometimes the median 2 or the basal 2 reduced to tubercles

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Fruit:8-15mm across including spines; mericarps with usually 4 spines (2 long on the back and 2 small at the base), sometimes 2 or all reduced to tubercles or absent, crested,glabrous or tubercled, or furnished with spiny tuberculate hairs .1-1.5 cm wide including spines; tubercled, glabrous or pubescent ;spines usually 4 in each mericarp (2 long median and 2 short basal) ; sometimes the median 2 or the basal 2 reduced to tubercles.

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خديجة عبدالله الشريف 

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