A | a 
, 
Lobeliaceae 371 
C. Calyx-tube oblong or shorter ; capsule short; stems creeping or diffuse, rooting 
at the nodes; corolla without white or yellow center. LAURENTIA (p. 371) 
CC. Calyx-tube 10 or more times as long as wide; capsule 2—7 cm. long; stems 
diffuse or erect, not rooting at the nodes; corolla with white or yellow center. 
DowninaciA (p. 371) 
AA. Plants aquatic; submerged leaves linear-setaceous or terete. 
D. Submerged leaves 2—5 cm. long, all in a basal tuft; perennial; corolla blue. 
LoBELIA (p. 371) 
DD. Submerged leaves 515 cm. long, scattered along an elongated stem; annual; 
corolla white. HowELtia (p. 372) 
LOBELIA (Rapuntium) LOBELIA 
Annual or perennial (ours). Leaves alternate, sometimes all basal, simple. Flowers 
in ours blue, in racemes, bracted. Calyx-tube turbinate or hemispheric or ovoid. Corolla- 
tube divided to base on | side; lobes adjacent to the cleft erect or recurved, turned away 
from the other 3. Stamens free from corolla; monadelphous at least above; 2 or 5 of 
the anthers with a tuft of hair at tip, 3 usually larger. Ovary 2-celled; stigmas 2. Cap- 
sule 2-valved, loculicidal. Seeds many. (Honor of M. de I’Obel, a Flemish botanist.) 
A. Aquatic; leaves all basal, terete, hollow. W. 
L. dortmanna L. (Water Lobelia) 
AA. | Terrestrial; most of the leaves scattered along the stem, flat, linear to spatulate. E. 
L. kalmii L. 
LAURENTIA 
Diffuse or creeping; ours annual, 2—-12 cm. long, in wet places. Leaves in ours 
entire, linear to lanceolate, sessile, 6—-12 mm. long. Flowers solitary in the leaf-axils and 
somewhat corymbose or racemose above, blue. Calyx-tube turbinate or oblong (ours) ; 
lobes narrow. Corolla-tube 6—8 mm. long (ours), as long as the limb, not split; larger 
lip 3-cleft, widely spreading, smaller lip 2-lobed, its lobes erect or divergent. Stamens 
barely exserted; filaments and anthers completely united; 2 anthers with a tuft of hair 
at tip. Capsule 2-celled, 2-valved. Seeds many, oblong or almost fusiform. (Honor 
of M. A. Laurenti, an Italian botanist.) E. 
L. carnulosa, Benth. 
DOWNINGIA (Bolelia) 
Annual, glabrous, in wet places. Leaves sessile, entire, the upper reduced to bracts. 
Flowers solitary in the leaf-axils, sessile, deep blue with white or yellow center. Calyx- 
tube adherent to the ovary, very long and slender, 3-sided, usually twisted; limb divided 
down to the ovary into 5 leaf-like lobes. Corolla-tube short, not split; large lip very 
wide, 3-lobed; smaller lip 2-lobed. Filaments and anthers both united into a somewhat 
curved tube; 2 anthers with a tuft of hair at tip. Capsule 2—7 cm. long (ours), 
2-celled but soon becoming |-celled, opening by 1—3 long cracks. Seeds many. (Honor 
of A. J. Downing, an American horticulturist. ) 
A. Leaves acute, lanceolate to ovate; 2 lobes of the smaller lip of the corolla lanceo- 
late. - E. D. elegans Torr. 
AA. Leaves mostly obtuse, lanceolate to linear; 2 lobes of the smaller lip of the co- 
rolla ovate-oblong. U.E.  D. pulchella Torr. 
