. American bee journal. Bee culture; Bees. 392 AMERICAN BEE JOURNAL October plant. It is thought that the rm'pose of these glands is to attract insects to the flowers so that cross fertilization may be effected. Both kinds of nec- taries occur in the cotton plant. Ek- tra-floral nectaries are found on the mid ribs of the leaves. Theso glands are diamond-shaped pits located about one-sixth of the distance between the stem and the top of the leaf. Other nectaries, while very closely con- nected with the flowers, are net true flower nectaries. The flower is en- closed in the ring or involucre of.
. American bee journal. Bee culture; Bees. 392 AMERICAN BEE JOURNAL October plant. It is thought that the rm'pose of these glands is to attract insects to the flowers so that cross fertilization may be effected. Both kinds of nec- taries occur in the cotton plant. Ek- tra-floral nectaries are found on the mid ribs of the leaves. Theso glands are diamond-shaped pits located about one-sixth of the distance between the stem and the top of the leaf. Other nectaries, while very closely con- nected with the flowers, are net true flower nectaries. The flower is en- closed in the ring or involucre of. Fig. 1.—Flower of cotton, showing nectary on side of calyx. three bracts and rarely a second ring of bracts. At the base of each bract is a large oval gland having an area of about two square millimeters ( No. 1). These glands are veiy con- spicuous and often highly colored. This group is popularly known as the "; Within the involucre, a true tubular calyx encloses the flower. At the base of this tube and at *hc open- ings between the involucral bracts are located three other nectaries fig. No. 2 ). These are slightly smaller than the first ring. A row of ne-taries is located on the inside of the calyx at the base of the petals. The petals are so arranged that they overlap. These nectaries are indicated by tufts of fine plant hair, located near the base of the petals. On account of the overlap of the petals, the surplus nectar from the calyx glands very often is found within these clusters ot haii's. This has given rise to the opinion that the edges of the petals also have nec- tar-bearing glands. In observing the bees working upon the cotton blos- soms for nectar, it appears that they more often insert their tongues be- tween the calyx and the petals to reach this nectar than forc^' their tongues between the petals. Thus it appears that all of the nectar-liearing glands of cotton are, in a way, extra- floral nectaries. In no instance were glands found at
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Keywords: ., bo, bookcentury1800, bookdecade1860, booksubjectbees, bookyear1861
