Text-book of structural and physiological botany . us ; the ovary unilocular or spuriously multilocular ; the seedswith a small straight embryo at the base of a copious endosperm ; thefruit a capsule, either bursting into two valves, and resembling a siliqua(Fig. 526, II.), or opening by pores, four to twenty in number, situatedbeneath the peltate stigma (see Figs. 233, 294, 313, pp. 126, 144,158). [Principal genera: — Platystemon^ Chelidonium^ Sa?tgtnnana,Papaver, Pschsc/joltzia, Argemone^ Glaucium, Meconopsis, Rcc??2eiia^Among ofiicinal products of the order are the foliage of the largercela
Text-book of structural and physiological botany . us ; the ovary unilocular or spuriously multilocular ; the seedswith a small straight embryo at the base of a copious endosperm ; thefruit a capsule, either bursting into two valves, and resembling a siliqua(Fig. 526, II.), or opening by pores, four to twenty in number, situatedbeneath the peltate stigma (see Figs. 233, 294, 313, pp. 126, 144,158). [Principal genera: — Platystemon^ Chelidonium^ Sa?tgtnnana,Papaver, Pschsc/joltzia, Argemone^ Glaucium, Meconopsis, Rcc??2eiia^Among ofiicinal products of the order are the foliage of the largercelandine Chelidonhim niajtis^ the petals of the common poppy PapaverRhceas^ and the dried latex of the unripe capsules of the opium-poppyPapaver souiniferMin. The latter is an important article of commercefrom Egypt, Turkey, [India, and China], yielding opium and laudanum. 412 Stritctitral and Physiological Botany, Order 2. CRUCiFERyE. (Figs. 527-530.) Herbs with alternateexstipulate leaves. The sepals are four, usually deciduous; the petals four,. Fig. 527.— Vesicaria tdriculata Fig. 528.— Wallflower, Cheiranthus Cheiri.(Siliculosae, natural size). (Siliquosse) ; I. part of plant; II. siliqua (natural size). special Morphology and Classification. 413 alternate with them, arranged in a cross, and usually unguiculate ; the stamens six, tetrady7tamous^ the two shorter ones belonging to an outer whorl and opposite to the carpels, the four longer ones to an inner whorl and attached in front of the placentae (see Figs. 200, 204, pp. 111,112). The ovary is superior ; the fruit as a rule a bilo- cular capsule, bursting from the base upwards ; if it is several times longer than broad, it is termed a siliqua (Fig. 528, II.); if only slightly or not at all longer than broad a silictila (Fig. 527). According as the dissepiment or repluin^ when seen in transverse sections, occupies the shorter or longer IV.
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