. Class-book of botany : being outlines of the structure, physiology, and classification of plants ; with a flora of the United States and Canada . Botany; Botany; Botany. THE FLAN OF THE FLOWER. as 5. Redundancies, a, In the multiplication of organs, b, In appendicular organs. 4. Union of parts. a. By cohesions, 6, By adhesions; .5. Irregularities-of development^ a, In homogeneous parts, .. 6, In the receptacle. 6. Combined deviations. We ahaB consider these several topics in their order. 418. The EiDioAL number of the floweb ia that which enumerates the parts composing each whorl. It varies
. Class-book of botany : being outlines of the structure, physiology, and classification of plants ; with a flora of the United States and Canada . Botany; Botany; Botany. THE FLAN OF THE FLOWER. as 5. Redundancies, a, In the multiplication of organs, b, In appendicular organs. 4. Union of parts. a. By cohesions, 6, By adhesions; .5. Irregularities-of development^ a, In homogeneous parts, .. 6, In the receptacle. 6. Combined deviations. We ahaB consider these several topics in their order. 418. The EiDioAL number of the floweb ia that which enumerates the parts composing each whorl. It varies from one to twenty, and. is expressed thus: V, Vi V, V, etc., which mathematical expressions are to be read by the words, dimerous (Jjf, two, /ilpoc, part), or ,2-parted; trimerous, or 3-parted; 4-merous, or 4rparted; pentameroua, or 5-parted; G-meroua, or 6-parted, etc. 419. ExoGENS AND ENDOQENS DiSTiNaniSHED. Pentamerous (V) flowers, like the rose, flax, when each whorl is (naturally) 5-parted, are, -more generally charac- teristic of the exogenous plants, V flowers of the endogens, as the lily, Trillium. The flowers of Fuchsia are V, of Circaea V, and of Hippuria 1 ?^• 420. Deficiencies. Incomplete flowers often occur. They lack some one or more entire sets of organs. When only one of the floral envelops, the caly?, ex- ists, the flower ia said to be apetalous or monochamydeaus (xTin/zvc, a cloak), as in elm, Phytolacca. These terms are also loosely applied to such plants as rhubarb, Anemone, liverwort, where the pieces of the perianth are all similar, although in two or three whorls. When the perianth ia wholly wanting, the flower is said to be fKhiamydeous or naked, as in lizard-taiL (264.) 267 266 265 264. 864, Flower of Saururas (lizard-tail); aohlymydeons. 265, Flower of Froxinus (ash). 266, Flower of Salix (willow), staminate. 267, pistillate. 421. Imperfect flowers are also of frequent occurrence. They are deficient in respect to the essential organs. A sterik or st
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