196 



ESSENTIAL ORGANS. STAMENS. 



313); in the latter case the lobes may divide at the base only, and 

 end in a sagittate or arrow-like mariner (fig. 334 I) ; or at the apex, 

 so as to be bifurcate or forked (fig. 335 p) ; or quadrifurcate, doubly 

 forked (fig. 336 I) ; or at both base and apex, so as to be forked at 



33.-, 



each extremity, as in Grasses (fig. 337). The cavities of the anther 

 are occasionally elongated so as to end in points (fig. 336 V). Some- 

 times the lower part of the antherine cavities is obliterated, and they 

 degenerate into flattened appendages (fig. 338 a). It happens at 



Fig. 329. Adnate or adherent anther of Begonia manicata, opening by longitudinal dehiscence. 

 7, Anther lobes. /, Filament. 



Fig. 330 Forked or bifurcate anther, I, of Acalypha alopecuroidea, in the expanded flower. 



Fig. 331. Same anther in the bud, exhibiting a curved form. 



Fig. 33?. Sinuous anther, I, of Bryonia dioica. /, Filament. 



Fig. 333. Anther of Salvia officinalis. If, Fertile lobe full of pollen. I s, Barren lobe without 

 pollen, c, Distraetile connective. 



Fig. 334. Anther of Nerium Oleander, with its lobes, 1 1, sagittate at the base, and ending at 

 the apex in a long feathery prolongation. 



Fig. 335. Anther, I, of Vaccinium uliginosum. I, Lobes ending in two pointed extremities, 

 which open by pores, a, Appendages to the lobes. 



Fig. 3.36. Quadrifurcate anther of Gualtheria procumbens. I, Lobes ending in four points. 



Fig. 337. Versatile anther of Poa compressa. /, Filament. I, Lobes separating at each end. 



Fig. 338. Anther, I, of Erica cinerea. /, Filament, r, Lobes split partially downwards, a, 

 Scale-like prolongations at the base. 



Fig. 339. Anther of Pterandra pyroidea. 1. Entire anther, seen laterally 2. Lower half 

 after having been cut transversely, a a', a, Antherine appendages. II, Anther-lobes, c e, Con- 

 nective. 



