. 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 102nd meridian . 6. PETRORHAGIA (Ser.) Link, Handb. 2: 235. 1831. Rigid and slender mainly perennial herbs, with small glomerate panicled or solitary flowers, bracted at tlie base. Calyx top-shaped or campanulate, 5-toothed, 5-iS-nerved. Petals 5, long- clawed, the limb emarginate or bifid. Stamens 10. Styles 2. Capsule ovoid or oblong, dehis- cent by 4 apical teeth or valves. Seeds compress
. 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 102nd meridian . 6. PETRORHAGIA (Ser.) Link, Handb. 2: 235. 1831. Rigid and slender mainly perennial herbs, with small glomerate panicled or solitary flowers, bracted at tlie base. Calyx top-shaped or campanulate, 5-toothed, 5-iS-nerved. Petals 5, long- clawed, the limb emarginate or bifid. Stamens 10. Styles 2. Capsule ovoid or oblong, dehis- cent by 4 apical teeth or valves. Seeds compressed, laterally attached; embryo straight, eccentric. [Greek, stone-breaking.] A genus of about 20 species, natives of southern Europe and a, the following typical.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
