660 



PART III. — THE CLASSIFICATION OF TLAXTS. 



that there is no calyx, that which is regarded as the calyx being probably an 

 involucre of bracteoles and bract : the stamens are each divided into two, so 

 that there are 8-10 bilocular anthers. 



Tribe 2. Lonicerece. Flowers more or less irregular, zygomorphic ; corolla 

 tubular : loculi containing several ovules. 



Lonicera, the Honeysuckle, has a somewhat bilabiate corolla (Fig. 461), and a 

 2-3-locular ovary ; L. Caprifolium and Periclymenum, with a climbing stem, are 

 well-known garden shrubs; in many species the fruit of two adjacent flowers 

 grow together to form a single berry {e.g. L. alpigena). Symphoricarpm 

 racemosus, the Snowberry, has a 4-5-locular ovary with white berries ; it is a 

 common ornamental shrub. Diervilla (or Weigelia) has a bilocular capsule ; D. 

 florida and rosea are ornamental shrubs. Linncea horealis is a small creeping 

 plant in Scotland ; it has 4 unequal stamens, the posterior being suppressed, and 

 a trilocular ovary. 



Cohort III. Asterales. Flower either irregular or regular, 

 pentamerous, zygomorphic in consequence of oligomery in the 



gynoeceum : calyx inconspicuous, 



Fig. 462.—^ Flower, B Fruit of Valerian : / 

 ovary ; fc calyx ; c corolla ; a spur : st stamens ; 

 <7 style; J) pappus. Floral diagrams, A of 

 Valerian ; abortive carpels x x : 5 of Cen- 

 tranthns. 



often wanting : stamens epi- 

 petalous, alternating with 

 the segments of the corolla: 

 ovary unilocular, ovule soli- 

 tary. 



Order 1. VALERIANACEiE. 



Flower irregular : calyx 

 rudimentary, sometimes 

 eventually assuming the form 

 of a hairy crown of ten rays, 

 called a pajppus, which is not 

 developed until after flower- 

 ing (Fig. 462 B, p) ; during 

 flowering it remains short 

 and infolded (Fig. 462 A, k) : 

 stamens 1-4, usually three : 

 carpels three, of which, how- 

 ever, usually only one de- 

 velopes, so that the fruit is 

 unilocular (Diagram A, Fig. 

 462) ; ovule single, sus- 

 pended : seed without endo- 

 sperm : leaves decussate, ex- 

 stipulate. 



Of the genera occurring in 

 Britain, Valeriana and Centranthus 



