. Agricultural news. Agriculture -- West Indies; Plant diseases -- West Indies. Vol. I. No. 8. THE AGRICULTURAL NEWS. 11rt them roughly into lour classes : 1, long; 2, medium ; 3, short, and 4, 1—Portion of stcui of Vanilla ]ilant, with leaf, aerial rncit, and cluster of tinwers ; It, front view nf Yaiiilla flower ; 'i. side view ; c, aerial root, with root hairs. 2—Single flower of Vanilla, exhibiting; the fiis stiige in the j)rocess of artiticial fertlization. The operator, jirovided with a tinely-jiointed piece of bamboo, divides the lip or labelluni medially, so that the central lo
. Agricultural news. Agriculture -- West Indies; Plant diseases -- West Indies. Vol. I. No. 8. THE AGRICULTURAL NEWS. 11rt them roughly into lour classes : 1, long; 2, medium ; 3, short, and 4, 1—Portion of stcui of Vanilla ]ilant, with leaf, aerial rncit, and cluster of tinwers ; It, front view nf Yaiiilla flower ; 'i. side view ; c, aerial root, with root hairs. 2—Single flower of Vanilla, exhibiting; the fiis stiige in the j)rocess of artiticial fertlization. The operator, jirovided with a tinely-jiointed piece of bamboo, divides the lip or labelluni medially, so that the central lol)e is separated from the two side lobes. This exposes the column and organ of fecundation. The instrument is represented as jilaced against the column, ready to press u]]wards the anther c, and bring the poUinia in contact with the stigma b. 3—Single flower of Vanilla, the second stage in the jirocess of artiticial fertilization ; h shows position of column exjiosed by division of the lip [the middle lobe of lip is ]iulled forward anil curled ujion itself to show the position of the cobnun ; the side lobes of lij), separated as shown in Fig. 2, arerepresented at back of the ciibnnn] ; (I, the position of |)ollen masses, taken from the anther and placed on the stigma. -Enlarged front view of top coluum ; a, the anther. :>f the 5—Enlarged side view of toji of the coluum ; a, the anther ; />, the stigma or visced surface on which the pollen masses must be placed to ensure fertilization. 6—Eidarged section through top of the column ; ti, one of the pollen masses iii, sifti ; 6, the stigmatic cavity. 7—Enlarged .section through top of the column ; a, the pollen masses, having been transferred from n. Fig. •>, are now represented in contact with the stigmatic surface. [Although diagram- matically shown, these figures give a tolerably good idea of what is actually necessary in order to produce fertili- zation in a Vanilla flower.] Fiu. 12.
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Keywords: ., bookauthorgreatbri, bookcentury1900, bookdecade1900, bookyear1902
