576 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Corolla bilabiate; stems leafy. 
Anther-bearing stamens 2....10. GRATIOLA (p. 586). 
Anther-bearing stamens 4. 
Sepals united into an 
angled tube; 
leaves’ merely 
toothed, or entire.11. Mrmuutus (p. 586). 
Sepals distinct or nearly 
so; leaves pinnat- 
ifid...........-.-.12. ConoBEa (p. 588). 
Lower lip or lobes of the corolla ex- 
ternal in the bud. 
Stamens 2, 
Corolla almost regularly 4- 
lobed; leaves mostly 
cauline; inflorescence 
not scapelike..........14. VeERonicA (p. 588). 
Corolla none, or 2-lipped; 
leaves basal; inflores- 
cence scapelike.......15. Brssrya (p. 590). 
Stamens 4. 
Corolla slightly 2-lipped, yel- 
low; stamens not ascending 
under the upper lip-..----- 16. Dasystoma (p. 590), 
Corolla distinctly 2-lipped, of 
various colors; stamens as- 
cending under the upper 
lip. 
Anther sacs dissimilar, the 
inner one pendulous by 
its apex; leaves mostly 
alternate. 
Calyx 2-phyllous, or by ab- 
sence of the lower part 
1-phyllous.........--- 17, ADENOSTEGIA (p. 590). 
Calyx gamosepalous, united 
into a tube below. 
Calyx deeply cleft before 
and behind, less 
deeply so (or not at 
all) on the sides; up- 
per lip of the corolla 
much longer than the 
3-lobed lower one; 
mostly perennials. ..18. CASTILLEJA (p. 591). 
Calyx almost equally 4- 
cleft; upper lip of 
corolla slightly if at 
all longer than the 1 
to 38-saccate lower 
one; annuals........19. OrTHOcARPUS (p. 594). 
Anther sacs alike, parallel; 
leaves mostly opposite. 
