. Botany for beginners : an introduction to Mrs. Lincoln's Lectures on botany : for the use of common schools and the younger pupils of higher schools and academies. Botany. 72 BOTANY FOR BEGINNERS. [Ch. Fig. 50. 288. liliaceous, a corolla with six petals, spreading gradually from the base, so as to exhibit a bell-form appearance,^ in the rr i 1 i T • 1 ' I ulip 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
. Botany for beginners : an introduction to Mrs. Lincoln's Lectures on botany : for the use of common schools and the younger pupils of higher schools and academies. Botany. 72 BOTANY FOR BEGINNERS. [Ch. Fig. 50. 288. liliaceous, a corolla with six petals, spreading gradually from the base, so as to exhibit a bell-form appearance,^ in the rr i 1 i T • 1 ' I ulip 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 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 they 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 in a gar- den in the morning, or towards evening, the flowers see'm more fragrant than in the middle of the day. The air being also more damp causes an increase of fragrance at those times, as the moisture, by penetrating the delicate tissue of the corollas, ex- pels the volatile oils. 288. What is a liliaceous corolla 7 289. What is a rosaceous corolla! 290. What is a papilionaceous corolla ? 291. When is a corolla said to be anomalous? 292. What causes the odour of flowers? 293. What effect has temperature upon the odour of flowers? 294. Why do fl
Size: 1605px × 1556px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1850, booksubjectbotany, bookyear1851
