BKUNONIACEAE 1147 



22. Lobelia Nuttallii Roem. & Schult. Annual or biennial, very slender, glabrous 

 or nearly so. Stems erect or ascending, wiry, 2-7 dm. long, simple or commonly branched 

 above, the branches sometimes filiform : leaves thickish ; basal with ovate or obovate 

 petioled blades : stem-leaves few ; blades oblanceolate or linear, 2-4 cm. long, entire or 

 distinctly toothed, sessile: racemes- 0.5-3 dm. long, loosely-flowered: pedicels nearly fili- 

 form, mostly longer than the bracts : sepals subulate, 2-2.5 ram. long : corolla pale or 

 light blue, 6-7.5 mm. long, usually surpassing the pedicel in length : capsules about 2.5 

 mm. broad, half-superior. 



In low or moist pine lands, Long Island and Pennsylvania to Florida, and rarely on mountain 

 summits in the Blue Ridge. Spring to fall. 



23. Lobelia Cliffortiana L. Annual, minutely pubescent or glabrous. Stems erect, 

 3-6 dm. tall, usually branched : leaf-blades ovate or ovate-lanceolate, 2-10 cm. long, 

 mostly obtuse, coarsely toothed or sinuate, the lower ones long-petioled, the upper short- 

 petioled or nearly sessile : racemes 1-3 dm. long, loosely-flowered : pedicels filiform, 1.2-4 

 cm. long, ascending or spreading : sepals subulate, 2.5-3 mm. long, longer than the turbi- 

 nate hypanthium : corolla blue, 6-7 mm. long ; tube just surpassing the sepals : capsules 

 ovoid, 5-6 mm. long, about half-superior. 



In waste places or cultivated ground in the Gulf States, introduced from tropical America. 



24. Lobelia Xalap6nsis H. B. K . Annual, glabrous or minutely pubescent. Stems 

 2-6 dm. long, commonly branched at the base or near it, the branches weak, often spread- 

 ing : leaf-blades ovate to suborbicular, mostly obtuse, rather closely crenate or incised-den- 

 tate, cordate or subcordate, or the upper truncate ; petioles as long as the blades or shorter : 

 pedicels filiform, 1.2-2.5 cm. long, ascending : sepals subulate, 2-2.5 mm. long, longer than 

 the hypanthium : corolla blue, 8-10 mm. long; tube surpassing the sepals : capsules nearly 

 oblong, 6-7 mm. long, fnlly two-thirds free. 



In sand, peninsular Florida, introduced from Mexico and the West Indies. 



25. Lobelia brachypoda A. DC. Annual, glabrous or nearly so. Stems simple or 

 erect, or branched at the base, the branches ascending, 3-8 dm. long: leaf-blades mainly 

 obovate-spatulate to oblong or lanceolate, 2-5 cm. long, acute or obtuse, serrate, gradually 

 or abrupt!}^ narrowed into petioles : racemes several-flowered, elongated : pedicels slender, 

 4-8 mm. long, curved : sepals linear-subulate, 3-5 mm. long, longer than the hypanthium : 

 corolla blue, 6-8 mm. long ; tube surpassing the sepals : capsules 4-5 mm. long, about half- 

 superior. 



In sandy soil, Texas and adjacent Mexico. Spring to fall. 



26. Lobelia Feayana A. Gray. Annual, slender, glabrous throughout. Stems 

 erect or branched at the base and spreading, 1-3 dm. long, often naked above : leaves few ; 

 basal with reniform, suborbicular or orbicular-ovate blades 0.5-1.5 cm. broad ; petioles 

 longer than tlie blades or shorter : the upper leaves few ; blades obovate or ovate, smaller 

 than the basal, short-petioled, entire or crenate : racemes few-flowered, 2-20 cm. long : 

 pedicels slender, 2-5 mm. long, surpassing the bracts : sepals subulate, 1.5-2 mm. long, 

 about as long as the tube : corolla bright blue, rather longer than the pedicel : capsules 

 about equalling the sepals, one-third superior. 



In pine lands, Florida. 



Family 4. BRUNONIACEAE Reiclienb. Goodenia Family. 



Herbaceous or shrubby plants, with watery sap. Leaves alternate or some- 

 times opposite, without stipules : blades entire or toothed or rarely pinnatifid. 

 Flowers perfect, regular or irregular, variously disposed. Calyx 5-toothed, an 

 entire border or sometimes obsolete. Corolla 5-lobed and more or less deeply 

 split on one side, of various colors : lobes valvate, sometimes Avinged. An- 

 droecium of 5 distinct stamens. Anthers usually free, opening lengthwise. 

 Gynoecium a single compound pistil. Ovary mostly inferior, 1-2-celled. Styles 

 usually united. Stigma surrounded with an indusium. Ovules 1 or 2, or more 

 in each cavity, mostly erect or ascending. Fruit drupaceous, berry-like or cap- 

 sular. Seeds usually one in each cavity. Embryo straight in the axis of the 

 fleshy endosperm. 



1. SCAEVOLA L. 



Fleshy, stout herbs or shrubs. Leaves alternate or rarely opposite : blades mostly en- 

 tire. Flowers irregular, axillary, in dichotomous cymes or rarely solitary. Calyx 5-lobed, 

 or a mere border. Corolla white or blue : lobes winged : tube split to the base on one side, 



