102 



STAMENS. 



[section 9. 



290. So aatliers are generally two-celled. But as the pollen begius to 

 form in two parts of each cell (the anterior and the posterior), sometimes 

 these two strata are not confluent, and the anther even at maturity may be 

 four-celled, as in Moonseed (Fig. 296) ; or rather, in that case (the word 



cell bt;ing used for each lateral half of the 

 organ), it is two-celled, but the cells bilocel- 

 lale. 



291. But anthers may become one-celled, 

 aud that either by eoufluence or by suppres- 

 sion. 



292. By confluence, when the two cells 

 run together into one, as they nearly do in 

 most species of Pentstemon (Fig. 297), more 

 so in Monarda (Fig. 300j, aud completely 



in the Mallow (Fig. 29S) and all the Mallow family. 



Fig. 296. Stamen of Moonseed, with anther cut acro.ss; tins 4-celled, or rather 4- 

 locellate. 



Fia. 297. Stamen of Pentstemon pubescens ; the two anther-cells diverging, aud 

 almost confluent. 



Fig. 298. Stamen of Mallow ; the anther supposed to answer to that of Fig. 297, 

 but the cells completely confluent into one. 



Fig. 299. Stamen of Globe Amaranth ; very short filament bearing a single 

 anther-cell; it is open from top to bottom, showing the pollen within. 



Fig. 300-305. Stamens of several plants of the Labiate or Mint Family. Fig. 

 300. Of a Monarda : the two anther-cells with bases divergent so that they are 

 transverse to the filament, and their contiguous tips confluent, so as to form one 

 cell opening by a continuous line. Fig. 301. Of a Calamintlia: tlie broad connec- 

 tive separating the two cells. FiG. 302. Of a Sage (Salvia Texana ; with long and 

 slender connective resembling forks of the filament, one bearing a good anther-cell ; 

 the other an abortive or poor one. Fig. 303. Another Sage (S. coccinea), with 

 connective longer and more thread-shaped, the lower fork having its anther-cell 

 wholly wantnig. FiG. 304. Of a White Sage, Audibertia grandiflnra; the lower 

 fork of connective a mere vesticre. Fig. 30.'). Of another White Sage (A. stachy- 

 oides), the lower fork of connective suppressed. 



