. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 442 ZYGOPHYLLACEAE. Vol. II. Family 66. ZYGOPHYLLACEAE Lindl. Nat. Syst. 1830. Caltrop Family. Herbs, shrubs, or some tropical species trees, the branches often jointed to the nodes. Leaves mostly opposite, stipulate, pinnate, or 2-3-foliolate, the leaflets entire. Stipules persistent. Flowers perfect, axillary, peduncled. Sepals usually 5, distinct, or united
. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 442 ZYGOPHYLLACEAE. Vol. II. Family 66. ZYGOPHYLLACEAE Lindl. Nat. Syst. 1830. Caltrop Family. Herbs, shrubs, or some tropical species trees, the branches often jointed to the nodes. Leaves mostly opposite, stipulate, pinnate, or 2-3-foliolate, the leaflets entire. Stipules persistent. Flowers perfect, axillary, peduncled. Sepals usually 5, distinct, or united by their bases. Petals the same number as the sepals, or none. Stamens as many as the petals, or 2-3 times as many, inserted on the base of the receptacle, the alternate ones sometimes longer; anthers versatile, longitudi- nally dehiscent; filaments usually with a small scale at the base or near the middle. Ovary 4-12-celled; style terminal; stigma usually simple; ovules i-numerous in each cavity, pendulous, or ascending. Fruit various, dry in our species. Endo- sperm of the seed copious or none; embryo straight or curved; cotyledons linear or oblong. About 20 genera and 160 species, widely distributed in warm and tropical regions. Fruit spiny, splitting into 5 3-5-seeded segments. Fruit not spiny, often tubercled, splitting into 10-12 i-seeded segments. 1. Tribuhis. 2. Kallstroemia. I. TRIBULUS [Tourn.] L. Sp. PI. 386. 1753. Herbs, mostly diffuse or prostrate, with evenly pinnate stipulate leaves and peduncled axillary yellow flowers. Sepals 5, deciduous. Petals 5, deciduous. Stamens 10, hypogynous, the alternate ones somewhat longer. Ovary sessile, S-lobed, S-celled, hairy; disk lo-lobed; style short; stigma 5-ridged; ovules 3-10 in each cavity, pendulous. Fruit S-angled, spiny, splitting into five 3-5-seeded segments. [Greek, three-pronged, Caltrop, from the resem- blance of the fruit to that implement.] About 12 species, natives of warm and tropical regions. Besides the fol
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
