62 



BALSAMINE^. 



off the coast of South America, by Bates in the butterflies of districts 

 separated by the tributaries of the Amazon, and perhaps most remarkable of 

 all, in the snails that inhabit the deep valleys of Hawaii. It was a strong 

 argument in favour of the theory that species are not immutable and that 

 new ones may arise iu isolated areas when there is no general mixing with 

 the main stock to prevent divergence. 



In the following key the name sand numbers of the sections (§ i. Scapi- 

 gerge, etc.), are taken from Sir Joseph Hooker's " Epitome of the Indian 

 species of impatiens" published 1904 — 1906. 



{ 



I 



I 



b^ 



c^ 



e^ 



I 



KEY TO THE SPECIES. 



No ordinary leafy stem above ground, the leaves all from 



the rootstock; flowers racemed on slender leafless 



stems, and in general appearance like an Orchid 



" Orchid Balsams " b 



Stem above ground leafy . c 



§ I. Scapigerce — ' Orchid Balsams J The wing petals are 



each cut into oblong lobes and together remind one of the 



label him of an Orchid. 

 Flowers white, 1 inch across ; spur J^ inch incurved, tip 



inflated /. 63. I. clavicornu. 



Flowers mauve pink, J^ to % inch across ; spur one-fifth 



inch, straight. . , . . . /. 64. I. modesta Wight. 

 Flowers on slender axillary pedicels ; sepals small or 



narrow d 



Flowers mostly in umbels or very contracted racemes on 



axillary peduncles ; sepals as long as the rest of the 



bud and nearly as broad ......... i 



Flowers in racemes, scarlet ; sepals almost circular ; lip 



horn-shaped with no distinction of blade and spur 



. . . (§ 7- Racemo<ice) . . . . /. 70. I. phoenicea. 



Annual herbs with all the leaves opposite e 



Well branched bush or shrub ; leaves mostly alternate, but 



often also in unequal pairs or threes ..... h 

 § 3. Floivers on axillary pedicels. Annual herbs ; leaves 



all opposite. 

 Flowers ^ inch stiff, or more ; spur slender, much longer 



than the wings ; stem stiff nearly always unbranched ; 



fruiting pedicels stiffly deflexed ; leaves serrate . . 3. 



p. 64. I. chinensis. 

 Flower J^ inch or less ; spur shorter than the wings, often 



a mere sac f 



Stem up to 18 inches high, not much if at all branched, 



flowers red or rose g 



Stem 4 to 7 inches flaccid ; flowers ^ inch ; lip hardly 



even saccate 4. /. 65. I. inconspicua. 



