I lO 



FLOWERS Ol' LAKES, RIVERS, ETC. 



bloom from [iily to September. It is a perennial, propagated by 

 division, antl is worth cultivating. 



There arc three types of plant which liave been found on the 

 Continent. In one the flower is conspicuous, and is rarely if ever self- 

 pollinated. This is a sun plant, occurring on embankments. In a 

 second less conspicuous shade form .self-pollination regularly occurs. 

 In places of an intermediate character, as ditch banks, there are tran- 

 sitional t)pes. None 

 of these forms contain 

 honey. The petals in 

 the sun plant are dark- 

 yellow and have red 

 spots at the base, like 

 honey-guides, and are 

 e.xpanded or bent back 

 at the tip. the petals be- 

 ing 12 nun. long and 6 

 V.1-— V .i^\ r¥/^' 1 ^ ^Baa.T ^Tfj .^'^ 'W*>''y :'g^ a mm- wide. The anther- 



\i^ '4ii^lS^> 1,7^^ r^;^"^^ ^"^ ^'^^ red-tipped. 

 tn\ -4 UMk , TV ,-' -t ji#".^*fefca. ^ >% i^' itsa^ I he anthers are included, 



and the style is much 

 longer, well projecting. 

 It an insect \isits the 

 tlower it touches the stig- 

 ma first and cross-polli- 

 nates the flower. In the 

 ab.sence of in.sects seed is 

 not set. as the anthers ar(' 

 not level with the stigma 

 and the flower is erect. 

 The petals in the shade plant are of a lighter yellow. There are 

 no red spots below. They are not so long or wide, being lo mm. and 

 5 mm. respectively, nor do they e.xpand so far, but are oblique. The 

 anther-stalks are greenish-yellow. Here the style and the two longer 

 inferior stamens are of equal length. Hence if the flower is not visited 

 and cross-pollinated by insects, self-pollination may occur. In the 

 third type the anther-stalks m,iv be red, or the petals may be larger, 

 or red and large, b'urther, the corolla may be slightly reddish at the 

 base, and in a fifth case the stvle may be longer than the longer 

 stamens. The flowers are visited bv pollen-.seeking insects. An insect 

 that is especially abundant where these plants are tound is Mac!-o/>is 



Great Yellow Lou.sksikii i: (Lvsinuuliia vuliroris, L.) 



