. A manual of botany. Botany. MORPHOLOGY OF REPRODUCTIVE ORGANS 177 2. Transverse.—This kind of dehiscence occurs in unilocu- lar anthers, as in those of Alchemilla {fig. 342), Lcnina, and Lavandula. It consists in the splitting open of the anther trans- versely or in a horizontal direction, that is, from the connective to the side. It sometimes happens that by the enlargement of the connective the loculus of a one-celled anther is placed hori- zontally instead of vertically, in which case the dehiscence when it takes place in the line of the suture would be apparently transverse, although rea
. A manual of botany. Botany. MORPHOLOGY OF REPRODUCTIVE ORGANS 177 2. Transverse.—This kind of dehiscence occurs in unilocu- lar anthers, as in those of Alchemilla {fig. 342), Lcnina, and Lavandula. It consists in the splitting open of the anther trans- versely or in a horizontal direction, that is, from the connective to the side. It sometimes happens that by the enlargement of the connective the loculus of a one-celled anther is placed hori- zontally instead of vertically, in which case the dehiscence when it takes place in the line of the suture would be apparently transverse, although really longitudinal. An example of this kind of dehiscence is afforded by the Mallow {fig. 359), and other plants belonging to the natural order Malvaceae. 3. Porous or Apical.—This is a, mere modification of longi- FlG 369. Fig. 362. Fig. Fiff. 359. Stamen of the Mallow (Jfalva), the anther of which has an appa- rently transverse dehiscence. Fiff. 360. Two-celled anther of Pyrola ?-oi7i«(iz/o/ja, suspended fi'om the filament,/. I. Loculi, each opening by a pore, p. Fig. 361. Qnadrilocular anther of Poranlhera. attached to filament,/. I. Locuh, each opening by a pore, p. Fitf. 362. Anther of Tetrathecajuncea, opening by a single pore at the apex. These figm:es are from Jussieu. Fiff. 363. Anther lobes of a species of Solanum, each opening by a pore at the apex. tndinal dehiscence. It is formed by the splitting down of the anther-lobes being arrested at an early period so as only to pro- duce pores or short slits. In such anthers there is commonly no trace of the sutures to be seen externally. The pores or slits may be situated either at the apex, as in the species of Solarium {fig. 363) and Milkwort {fig. 341); or laterally, as in the Heaths {fig. 356, r). There may be either two pores, as is usually the case {fig. 360, p), or four as in Poranthera {fig. 361, p), or many as in the Mistletoe, or only one as in Tetratheca juncea {fig. 362). 4. Valvular.—This term is app
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