The American botanist and florist; including lessons in the structure, life, and growth of plants; together with a simple analytical flora, descriptive of the native and cultivated plants growing in the Atlantic division of the American union . TUBAL BOTANY. in Orchis. Inequality in length is definitely marked in twocases, as tetradynamous (rsrpacr, four, (JOva^ic:, power) when the sta-mens are six, whereof four are longer than the other two, as inall the Crucifers; didynamous^ where the stamens are four, twoof them longer than the other two, as in all the Labiates (104,106).120. Cohesion is a
The American botanist and florist; including lessons in the structure, life, and growth of plants; together with a simple analytical flora, descriptive of the native and cultivated plants growing in the Atlantic division of the American union . TUBAL BOTANY. in Orchis. Inequality in length is definitely marked in twocases, as tetradynamous (rsrpacr, four, (JOva^ic:, power) when the sta-mens are six, whereof four are longer than the other two, as inall the Crucifers; didynamous^ where the stamens are four, twoof them longer than the other two, as in all the Labiates (104,106).120. Cohesion is as frequent with stamens as with j^ are 7)%onadelpli(niS (a,^£X(po^, a brother) when they are allunited, as in Mallow, into one set or brotherhood by the fila-ments ; diadelphous in two sets, whether equal or unequal, as inPea, Squirrel-corn; polyadelphous^ many sets, as in St. Johns-wort; and syngenesious^ when they are united by their anthers,as in the Composite. Finally, the absence of the stamens alto-gether, whether by abortion, as in the $ flowers of Veratrum,or by suppression, as in Oak, occurs in various modes, render-ing the plant monoecious (5), dioecious (^ ?), oi polygamous(<$ ^ ?), as already explained (§ 67).. ^;^^ 110 Pvlhu rjrahig.—i^m, Pirns hirico. 108, Basella rubra. 109, Kanunculus repens. 110, Scolymus grandi- flovus. Ill, Passifiora incaruata. 121. The pollen is in appearance a small, yellow dust, con-tained in the cells of the anther. When viewed with the mi-croscope it appears as grains of various forms, usually spheroidalor oval, sometimes triangular or polyhedral, but always of thesame form and appearance in the same species. Externally theyare curiously, and often elegantly figured with stripes, bands,dots, checks, etc. Each grain of pollen is a membranous cell orsack containing a fluid. Its coat is double—the outer is morethick and firm, exhibiting one or more breaks where the inner THE ESSENTIAL ORGANS. 43 In the coat, which is ver
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbotany, bookyear1870
