. Botany for beginners: an introduction to Mrs. Lincoln's Lectures on botany. Plants. 72 BOTANY FOR BEGINNERS. L^b- -£I^ 288. Liliaceous, a corolla with six petals, spreading gradually from the base, so as to exhibit a bell-form appearance, as in the Tulip and Lily. 289. Rosaceous, a corolla formed of roundish spreading petals, without claws, or with very short ones, as the Rose, and Apple. 290. Papilionaceous, a flower with a banner, two wings, and a keel; the name is derivec1 from the word papilio, a butterfly, on ac- count of a supposed resemblance 5k to this insect, as in the Pea blos- som
. Botany for beginners: an introduction to Mrs. Lincoln's Lectures on botany. Plants. 72 BOTANY FOR BEGINNERS. L^b- -£I^ 288. Liliaceous, a corolla with six petals, spreading gradually from the base, so as to exhibit a bell-form appearance, as in the Tulip and Lily. 289. Rosaceous, a corolla formed of roundish spreading petals, without claws, or with very short ones, as the Rose, and Apple. 290. Papilionaceous, a flower with a banner, two wings, and a keel; the name is derivec1 from the word papilio, a butterfly, on ac- count of a supposed resemblance 5k to this insect, as in the Pea blos- som, (Fig. 50.) 291. When a corolla is of no determinate form, it is said to be Odour of Flowers. 292. The odour of flowers has its origin in the volatile oils, elaborated by the corolla. 293 Temperature renders the odours of flowers more or less sensible; if the heat is powerful, it dissipates the volatile oils more rapidly than they are renewed ; if the heat is very feeble, the volatile oils remain concentrated in the little cells where thev were elaborated ; in both cases the flowers appear to have but" little odour. But if the heat is neither too great nor too little the volatile oils exhale without being dissipated, forming a per- fumed atmosphere around the flowers. 294 You see now the reason, that when you walk m a gar- den in the morning, or towards evening, the flowers seem more fragrant than in the middle of the day. The air being also mor damp causes an increase of fragrance at those times as th< moisture, by penetrating the delicate tissue of the corollas, ex- pels the volatile oils. 288. What is a liliaceous corolla 1 289. What is a rosaceous corolla'? 290 What is a papilionaceous corolla 7 291 When is a corolla said to be anomalous i 292 What causes the odour of dowers 1 AnTtrorc i oq^ What effect has temperature upon the odour of flowers { 294. Why do flowers appear peculiarly fragrant in the rooming md evenirg?. Please note that these images ar
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectplants, bookyear1849
