144 



6. Gratiola L. Sp. PI. 17. 1753. 

 T3'pe species, G. officinalis L., of Europe. 



Corolla slightl}' exceeding caXyx., externally glabrous. 

 Capsule nearly p3-raniidal, acuminate. Pedicels very 

 short. Stem pubescent with several-celled hairs. (Pilosae.) i. G. pilosa 

 Corolla more than twice as long as the calyx, externally more 

 or less puberulent. Capsule broader, acute to rounded. 

 Pedicels longer. Stem glabrous or puberulent with one- 

 celled hairs, these frequently gland-bearing. 

 Pedicels exceeding 10 mm. in length. Corolla within 

 throat on posterior side densely pubescent with 

 knobbed hairs. Capsule ovate, equaled or ex- 

 ceeded by the sepals. Seeds 3-5 mm. long, semi- 

 globose to oblong. 

 Capsule 1-3 mm. long, exceeded bj- the sepals. 

 Stem-leaves clasping by a broad base, usually at 

 least the upper with resinous dots. Roots 

 perennial, slender. Stoloniferous. (Ramosae.) 

 Corolla golden-yellow throughout. Capsule 

 3 mm. long, little exceeded by the sepals. 

 Leaves lanceolate to nearly ovate, entire or 

 distally obscurelj^ denticulate, with blackish 

 glandular dots. 

 Leaves linear to lanceolate, frequently denti- 

 culate distally, usually strongh- puncticulate. 

 Sepals obtusish to acute. 2. G. aiirea. 



Leaves lanceolate to nearly ovate, entire, ob- 

 scurely puncticulate distally. Sepals very 



obtuse. 2a. G. aurea obtusa. 



Corolla with throat dull-yellow, the lobes white. 

 Capsule 2 mm. long, much exceeded by the 

 sepals. Leaves ovate, serrate, the upper some- 

 times with sparse glandular dots. 3. G. viscidula. 

 Capsule 4-5 mm. long, about equaled by the sepals. 

 Stem-leaves narrowed to a sessile or slightly clasping 

 base, not resinous-dotted. Roots annual, the 

 main root thick and giving off numerous fibers. 

 Not stoloniferous. (Neglectae.) 4. G. neglecla. 

 Pedicels less than 5 mm. in length. Corolla within 

 throat on posterior side pubescent with knobless 

 hairs. Capsule globose, 5-6 mm. long, slightly ex- 

 ceeding the sepals. Seeds 7 mm. long, linear. Leaves 

 and root as in Neglectae. {Virginianae.) 5. G. virginiana. 



I. Gratiola pilosa Michx. Fl. Bor. Am. i: 7. 1803. "Hab. 

 in Carolinae inferioris uliginosis." Description suffici- 

 ently distinctive. 



