ORGANS OF REPRODUCTION. 253 



Fig. 524. Fig. 525. Fig. 526. Fig. 527. Fig. 528. 



Fig 524. Anther of the Pijrola rotundi folia, suspended from the filament /, 

 /. Locnli opening by two pores p. -^^ — Fig. 52.5. Quadrilocular anther of 



Poranthera, attached to filament/. I. Loculi opening by pores p. 



Fig. .52(5. Anther of Tetratheca juncea, opening by a single pore at the apex. 



These figures are from Jussieu Fig. 52'. Anther lobes of a species of 



Nightshade opening by pores at the apex Fig. 528. Anther of Barberry 



{Berberis vulgaris) opening by two valves. 



Fig. 529. 

 so a.s only to produce pores or short 

 slits (Jigs. 524 — 527). In such anthers 

 there is commonly no trace of the sutures 

 to be seen externally. The pores or slits 

 may be either situated at the apex, as in 

 the Nightshade (Solanum) (fig. 527), or 

 laterally, as in the Heaths (Jig. 520). There 

 may be either two pores, as is usually the 

 case (Jig. 524), or four, as in Poranthera 

 (Jig. 525), or many, as in the Mistletoe, 

 or only one, as in Tetratheca juncea (fig. 

 526). 



4. Valvular. — This name is applied when 

 the whole or portions of the face of the 

 anther open like trap- doors, Avhich are 

 attached at the top and turn back as if 

 on a hinge. In the Barberry (Berberis) 

 (Jig. 528) there are but two such valves, 

 Avhile in the Sassafras and other plants 

 belonging to the Laurel family, there are 

 four, that is, two to each lobe, placed in 

 pairs one over the other (fig. 529). 



The Stamens generally or the Andrcecium. — Having 

 now described the two parts of the stamen and the matters 

 generally connected with their development, we have in the 

 next place to take a view of the stamens of the flower col- 

 lectively, in their relations to each other, and to the other whorls 

 of the flower. We shall consider this part of our subject under 



Fig. 529. Stamen of a 

 species of Laurus. /. 

 Filament, with two 

 glands g. g at its 

 base. ?, I. Loculi of 

 which there are four. 

 V. "Valves. 



