. Class-book of botany: being outlines of the structure, physiology and classification of plants; with a flora of the United States and Canada. Botany; Plants; Plants. 114 PERICARP. 556. The acheniumJs a small, dry, indehiscent pericarp, free from the one seed which it contains, and tipped with the remains of the style (buttercups, Lithospermum). 557. The double aehenium of the Umbeliferas, supported on a carpophore is called cremocarp. The 2-carpeled aehenium of the Composite, usually crowned with a pappus, is called cypsda. 558. The achenia are often mistaken for seed3. In the Labiatae and B
. Class-book of botany: being outlines of the structure, physiology and classification of plants; with a flora of the United States and Canada. Botany; Plants; Plants. 114 PERICARP. 556. The acheniumJs a small, dry, indehiscent pericarp, free from the one seed which it contains, and tipped with the remains of the style (buttercups, Lithospermum). 557. The double aehenium of the Umbeliferas, supported on a carpophore is called cremocarp. The 2-carpeled aehenium of the Composite, usually crowned with a pappus, is called cypsda. 558. The achenia are often mistaken for seed3. In the Labiatae and Bor- rageworts they are associated in fours (372). In Geum, Anemone, etc., they aro collected in heads. The rich pulp of the strawberry consists wholly of the over- grown receptacle, which bears the dry achenia on its surface. (440). 433 440 435 436. 434 437 4SS 439 432, Achenia of Anemone thalietroides. 433, Cremocarp of Archangelica officinalis, its halve* {meroearps) separated and suspended on the carpophore. 434, Cypsela of Thistle with its plumous pappus. 435, Utricle of Chenopodium (pigweed). 436, Caryopsis of Wheat. 437. Samara of Elm. 433, Glans of Beech. 439, Drupe of Prunus. 440, Fruit of Fragaria Indica, a fleshy torus like the strawberry. 559. The utricle is a small, thin, pericarp fitting loosely upon its one seed, and often opening transversely to discharge it (pigweed, prince's feather). 560. Caryopsis, the grain or fruit of the grasses, is a thin, dry, 1- seeded pericarp, inseparable from the seed. 561. Samara ; dry, 1-seedccl, indehiscent, furnished with a mem- branous wing or wings (ash, elm, maple). 562. Glans or nut ; hard, dry, indehiscent, commonly 1-seeded by suppression (§ 545), and invested with a persistent involucre called a cupule, cither solitary (acorn, hazelnut) or several together (chestnut, beechnut). 563. Drupe, stone-fruit; a 3-coatcd, 1-celled, indehiscent pericarp, exemplified in the cherry, peach. The outer coat (epidermis) is called the cp
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