1920.] NATURAL SCIENCES OF PHILADELPHIA. 145 



Outermost sepal ovate-oblong, scarcely longer than 

 the lanceolate innermost, one of which may 

 be lost. Capsule nearly globose, obtuse, pale- 

 brown, little shorter than the sepals. Styles 

 distinct near apex. Corolla white. 

 Corolla 4 mm. long, appearing four-lobed be- 

 cause the three petals forming the anterior 

 lip are all evident. Stamens four. Sepals 

 five or four. 7. Macuillamia. 



Corolla 2 mm. long, appearing three-lobed be- 

 cause the anterior petal is lost, leaving the 

 anterior lip two-lobed. Stamens three 

 (only one of the antero -lateral pair devel- 

 oped). Sepals four. 8. Hydranthelium. 

 Corolla white, denselj^ hirsute within over bases of 

 all lobes. Sepals four, uniform. Leaves pin- 

 nately veined, serrate-dentate. Pedicels per- 

 manently ascending -spreading. Plant erect. 



9. Scoparia. 

 Anther-sacs separated on short arms of the connective. 

 Seeds longitudinally striate, the striae frequently 

 tuberculate. Corolla blue or white. Plants erect. 

 Pedicels bibracteolate, 1 mm. long or less. Corolla 

 blue, pubescent within on the anterior side. Cap- 

 sule acuminate. Seeds tuberculate-striate. Leaves 

 cordate-clasping at base. Tall herb. 



10. Stemodia. 

 Pedicels not bracteolate. Corolla pubescent within 



on the posterior side, or glabrous. Seeds min- 

 utely roughened-tuberculate or smooth. Leaves 

 narrowed at base. 

 Leaves sessile or nearly so, in whorls of three. Cor- 

 olla 9-13 mm. long, glabrous within, blue. 

 Capsule acuminate. Seeds minutely roughened- 

 tuberculate. Style semi-persistent. Tall herb. 



11. Unanuea. 

 Leaves evidently petioled. opposite. Corolla 4-8 



mm. long, pubescent within on the posterior 

 side, blue or w^hite. Capsule acutish. Seeds 

 smooth, with rounded ridges. Style soon de- 

 ciduous. Low herbs. 12. Lendneria. 

 Corolla violet-blue or white, with two raised ridges (each 

 formed by the adherence of a filament) to the antero- 

 lateral sinuses, and which frequently project as knob- 

 like processes beyond those points (the free portion 

 of the filament appearing as a lateral outgrowth of 

 the adherent portion). Style with a semi-persistent, 

 frequently enlarged and callose base. Septum per- 

 sistent, with the attached placentae. Pedicels never 



