296 
PERILLA FRUTESCENS (L.) Britton, Mem. Torr. Club, §: 277. 1894. 
This garden plant is establishing itself along the roadsides in 
the foothills of the mountains of Georgia, notably between Toccoa 
Falls and Tallulah Falls. 
THE NORTH AMERICAN SPECIES OF ILYSANTHES. 
Field experience with //ysanthes convinces me that the genus 
has never been correctly understood. The botanists of the early 
part of this century seem to have limited the species much better 
than later authors. Among the later botanists Dr. Chapman* has 
given us the most satisfactory interpretation of the genus, but he 
makes J. gvatioloides a composite. Dr. Gray’s treatment in the 
Synoptical Flora+ is inferior in that it contains the compo- 
site species just mentioned, and reduces /. saxicola, a clearly dis- 
tinct species,to a variety or state of J/. refracta. The following 
seems to me to be the proper division of the genus: 
Key to the Species. 
Stems creeping, leafy throughout ; leaves orbicular or orbicular-ovate, all sessile, rounded 
at the base. 
Leaves entire ; upper lip of the corolla much Shorter than the lower ; capsule slen- — 
der, much shorter than the calyx. 1. 1. grandiflora. 
Leaves 3-toothed; upper lip of the corolla about equalling the lower; capsule 
stout, equalling or slightly exceeding the calyx. 2. J. tridentata. 
Stems erect or ascending, not creeping; leaves more or less elonga’ed, the lower ones 
usually narrowed at the base. 
Pedicels shorter than the leaves ; ae epaed commonly as long as Or longet 
than the capsule. 3. Z. attenuata. 
Pedicels longer than the leaves ; calyx-segments shorter than the capsule. 
Leaves slightly reduced above; pedicels ascending or spreading. 
Upper leaves more or less clasping; capsules much longer than the calyx- 
segments, 4. 1. gratioloides. 
Upper leaves not at all clasping; capsules slightly longer than the calyx 
segments. 5. 7. saxicola. 
Leaves reduced to narrow inconspicuous bracts above ; pedicels reflexed. 
6. Lf. reflexa. 
1, ILYSANTHES GRANDIFLORA (Nutt.) Benth. in DC. Prodr. 10: 418. 
1846. a 
Linderma grandiflora Nutt. Gen. 2: 43. 1818. 
* Fl, S. States, 294. 
¢ Syn. Fl. 2: Pt. 1, 283. 
