396 CAMPANULACE. [Colensoa. 
OrpER XLI. CAMPANULACEZ. 
Herbs or shrubs, usually with milky juice. Leaves alternate, 
seldom opposite, entire or toothed, rarely lobed or dissected ; sti- 
pules wanting. Flowers hermaphrodite, rarely unisexual, regular 
or irregular. Calyx-tube adnate to the ovary; limb 4—6- usually 
5-lobed. Corolla gamopetalous, epigynous, regular or irregular and 
split to the base at the back, 4-6-lobed; lobes valvate, often in- 
duplicate. Stamens as many as the corolla-lobes and alternate 
with them, epigynous or more rarely inserted on the tube of the 
corolla ; anthers free or united into a tube. Ovary inferior, rarely 
semi-superior, 2—5-celled; style single; stigmatic lobes as many as 
cells to the ovary; ovules numerous, anatropous, placentas in the 
inner angles of the cells. Fruit a capsule or berry. Seeds nu- 
merous, small; albumen fleshy; embryo straight, axile; radicle 
next the hilum. 
A large order, perhaps most abundant in the temperate regions of the 
Northern Hemisphere, but extending through the tropics, plentiful in South 
Africa, and present in fair numbers in other portions of the south temperate 
zone. Genera 55; species about 1000. Asa whole, the order is characterized by 
the presence of acrid and poisonous qualities, and many of the species are 
highly dangerous. Few possess any economic importance, but many kinds of 
Campanula and Lobelia are cultivated in gardens for the beauty of their flowers. 
Of the New Zealand genera, Lobelia and Wahlenbergia are widely distributed ; 
Pratia is confined to the south temperate zone; Isotoma is chiefly Australian ; 
while Colensoa is endemic. 
Trise 1. LOBELIEA. 
Corolla irregular, 2-lipped. Anthers cohering. 
Tall herb. Flowers in racemes. Fruit an indehiscent 
berry oc ote te Be xe .. 1, CoLENsoa. 
Creeping herbs. Flowers solitary, axillary. Fruit an 
indehiscent berry .. ic Ss te ot 
Herbs. Corolla split to the base at the back. Stamens 
free from the corolla-tube. Fruit a capsule, 2-valved at 
thetip .. 5 ae be =. .. 93. LOBELIA. 
Herbs. Corolla not split to the base; stamens affixed to 
the tube. Fruit a capsule, 2-valved at the tip .. 4. Isotoma. 
2. PRATTA. 
TRIBE 2, CAMPANULE. 
Corolla regular. Anthers free. 
Herbs. Corolla campanulate. Capsule 2-3-valved at the 
tip oe 56 ae 5: . 5, WAHLENBERGIA. 
1. COLENSOA, Hook. 
A tall erect leafy herb, often woody at the base. Leaves large, 
alternate, doubly serrate. Flowers large, in terminal racemes. 
Calyx-tube adnate to the ovary, limb 5-partite. Corolla oblique, 
curved, split to the base at the back, 2-lipped ; upper lip of 2 linear 
acute lobes, lower of 3 oblong spreading ones. Stamens exserted ; 
filaments pubescent, free for the greater part of their length; 
anthers cohering into a tube, pilose on the connective and at the 
