THE FLOWER 



129 



175. Unisexual Hoovers of 

 Moouseedjliorne on 

 different plants. 



177 



Monoecious (i.e., of one household), wlien flowers of both sorts or 

 sexes are produced by the same individual plant, as in the Ricinus or 

 Castor Oil plant (Fig. 174). 



Diocciou.t {i.e., of separate households), 

 when the two kinds are borne ou different 

 plants ; as in Willows, Poplars, and Moon- 

 seed (Fig. 175). 



Poli/gamou.'!, when the flowei's are some of 

 them perfect, and some staminate or pistil- 

 late Oul)'. 



254. A blossom having stamens and no 

 pistil is a slamimile or male flower. Sometimes it is called a sterile 

 flower, not appropriately, for other flowers may equally be sterile. 

 One having pistil but no stamens is a pislillale or female flower. 



255. Incomplete flowers are so named in con- 

 tradistinction to complete; they 

 want either one or both of the 

 floral envelopes. Those of the 

 Anemone (Fig. 176) are incom- 

 plete, having calyx but no corolla. 

 The sepals, however, are highly col- 

 ored and petal-like. The flowers 

 of Sannirns or Lizard's tail, although perfect, 

 have neither calyx nor corolhi (Fig. 177). Incomplete flowers, accord- 

 ingly, are : — 



Ndked or acldumtjiieous, destitute of both floral envelopes, as in 



Fig. 177, or — 



Apelaloiis, when wanting only 

 the corolla. The case of corolla 

 present and calyx wholly wanting 

 is extremely rare, although there 

 are seeming instances. In fact, a 

 single or simple perianth is taken 

 to be a calyx, unless the absence 

 01' abortion of a calyx can be 

 made evident. 



256. Ill contradistinction to 

 regular and symmetrical, very 

 many flowers are : — 



Irref/iilcir, that is, with the mem- 

 l)ers of some or all of the floral 

 circles unequal or dissimilar. A 

 special and important case of floral 

 irregularity is sliown by — 



Zygomorphic flowers which, like 



17«, 179. Mustard; 17«, flower; 179, 

 its stamens and pistil separate 

 and enlarged. 



180,181. Violet; 180, flower; 181, its 

 calyx and corolla displayed ; tlie 

 five smaller iiarts are the sepals; 

 the five intervening larger ones 

 are the petajs- 



ouT. or nor. — 9 



