406 LOBELIACEZ LOBELIA 
HOWELLIA 
LOBELIA L. Gen. n. 1099. 
Herbs, or rarely shrubs with alternate leaves, and red ,yellow, 
blue or white flowers. Calyx-tube turbinate, hemispheric or 
ovoid, adnate to the ovary. Corolla-tube divided to the base on 
one side; the limb bilabiate, the lobe on each side of the cleft 
turning away from the other three, which are somewhat united. 
Stamens free from the corolla-tube, monadelphous, at least above, 
2 or all of the 5 anthers with a tuft of hairs at their tips, 3 of them 
usually larger than the other 2. Ovary 2-celled, the 2 placentae 
many-ovuled. Stigma 2-lobed. Capsule loculicidally 2-valved. 
L. Dortmanna L. Sp. 929. Aquatic perennial: glabrous throughout : 
stem slender, simple, erect, hollow, A Bhs. paca” a few fleshy bracts, 6-18 
inches high: leaves all submersed and tufted at the base of the stem, 
terete, obtuse, 1-2 inches long, hollow and longitudinally divided by a 
partition: flowers blue, in a loose terminal raceme, 6-8 lines long, on fili- 
form pedicels: calyx-lobes subulate: larger lip of the corolla glabrous or 
nearly so. Borders of ponds, northwestern Washington to subarctic Amer- 
ica and the Northeastern States. 
2 HOWELLIA Gray Proc. Am. Acad. xv, 43. 
Aquatic or semiaquatic herbs with alternate leaves, at least 
below, and small white flowers. Flowers of 2 forms; the emersed 
with conspicuous corolla, the submersed with corolla undeveloped. 
Calyx with slender tube, adnate for its whole length to the ovary, 
and a limb of 5 nearly equal narrow lobes. Corolla not surpass- 
ing the calyx, its very short tube split nearly to the base on one. 
side; its 5 lobes almost equal. Stamen-tube nearly free, and 
with the included style slightly incurved. Anthers oval, the two 
smaller trisetulose; the three larger naked. Ovary strictly 1-cell- 
ed, with two filiform parietal placentae, each 3-5-ovulate, upper 
ovules ascending, the lower pendulous. Capsule membranaceous, 
at maturity bursting irregularly on one side. seeds few, large, 
smooth, callous-apiculate at the chalaza. 
H. aquatilis Gray 1. c. Aquatic annual: stem weak, 6-18 inches high, 
branching: submersed leaves linear-setaceous, 2-6 inches long, entire; 
emersed leaves linear to oblong, sometimes sparingly toothed: flowers ax- 
illary, short-peduncled ; calyx-lobes subulate or filiform, 2-4 lines long; 
corolla white, its lobes oblong: capsule half-inch long, linear-clavate, bear- 
ing a few soft white seeds. In ponds, in the vicinity of Portland, Oregon. 
3 LAURENTIA Neck, Elem. i, 131. 
Small and diffuse or creeping herbs with alternate leaves and 
axillary blue flowers. Calyx-tube and adnate ovary turbinate or 
oblong, the 5 lobes narrow. Corolla with tube as long as the 
limb, and not split; its larger lip 3-cleft and widely spreading; 
the smaller of two more erect or diverging divisions. Filaments 
and anthers completely united ; two of the latter minutely bristle- 
tufted at the apex, nearly included. Capsule 2-valved across the 
projecting free apex, 2-celled. Seeds oblong or almost fusiform. 
L. carnosula Benth. Glabrous somewhat succulent annual: stems 1-5 
