392 LOBELIACEiE. [part ii. 



all have the two hornlike segments of the upper 

 lip, and the rounded lobes in the pendulous 

 under lip ; and many of the plants formerly 

 called Lobelia which differ in these particulars 

 have been placed in other genera. Thus Tupa, 

 which contains several of the large scarlet- 

 flowered species, has the segments of the limb 

 of the corolla united at the tip ; the filaments 

 of the stamens cohering as well as the anthers, 

 and the stigma protruding. Siphocampylos has 

 the tube of the corolla ventricose in the middle, 

 the segments of the upper lip long and curving 

 over each other, and the lower lip very slightly 

 lobed, with both the filaments and the anthers 

 combined. In Dortmannia the filaments are 

 free, and only the anthers combined; inPara- 

 stronthus (L. unidentata)^ there is scarcely any 

 tube to the corolla, and in Isotoma, the corolla 

 is salver-shaped. The beautiful little Clintonia 

 pulchella belongs to this order, and it differs 

 from Lobelia in its corolla having scarcely any 

 tube, and also, but more decidedly, in the very 

 long tube of its calyx. This is so long and slen- 

 der as to look like a part of the flower-stalk ; as 

 does the capsule, which, when ripe, is triangular, 

 and is as long as the silique of a cabbage or 

 wall-flower, to which it bears considerable re- 

 semblance. All the Lobeliacese have an acrid 

 milky juice, which is poisonous. 



