PENNELL: PLANTS OF SOUTHERN UNITED STATES 481 
under the Vienna Code permits the repetition of the same 
specific name. 
Collected in fruit Senkeiear 8, 1913, moist shady soil, west of 
Sapulpa, Creek County, Oklahoma, my number 5389. 
The following key to the species of Rhexia is offered: 
Anthers relatively short, oblong, straight, not spurred at base. 
Petals yellow. Leaves lanceolate. 1. R. tulea Walt. 
Petals pink-purple. Leaves ovate. 
Hypanthium glabrous. Upper surface of the leaves hirsute. 
R. petiolata Walt. 
Hypanthium glandular-hirsute. Upper surface of the leaves glabrous, 
R. serrulata Nutt. 
Anthers longer, linear, curved, spurred at the bas 
Anther-sacs very slightly spurred. Petals foal than ro mm. — white 
4. parviflora Chace. 
Anther-sacs evidently spurred. Petals more than 10 mm. sBi te pale pink (or 
white in R. lanceolata) to pink-purple. 
Leaves membranous, green; lateral nerves not close to the margin; upper 
surface of some or all leaves hirsute. Hypanthium glandular-hirsute 
to glabrous. 
Apex of hypanthium not lanose. Calyx-lobes less than one-third 
length of hypanthium. 
Stem spas if at all winged, internodes conspicuously hirsute. 
ves narrowed at base. Neck of hypanthium equaling 
or si slightly shorter than the body. 
Petals pale-pink to white, 10-15 mm.long. Buds with sepal- 
tips mostly spreading-recurved. 
Leaves elliptic-ovate to lanceolate, all evidently three- 
veined, mostly over 2 cm, long, the lower witha 
more or less petiolar 
Leaves elliptic-ovate, on etdiies petioles 3-4 mm: 
long. Petals about 10 mm. long. 
5. R. delicatula Small. 
Leaves lanceolate to elliptic-lanceolate, on _ ill- 
defined petioles. Petals 12-15 mm. long. 
6. R. mariana L. 
Leaves narrowly-lanceolate to linear, only the. main 
stem-leaves if any three-veined, mostly less than 2 
cm. long, sessile. Petals 10-12 mm. long. 
. R. lanceolata Walt. 
Petals deep purple-pink. Buds with sepal-tips mostly 
ascending-app: 
Petals 18-25 mm. wit Hypanthium 10-14 mm. long 
its neck equaling the body. Stem obscurely cialis 
Leaves linear, sparsely hirsute, lateral nerves ob- 
scure. 8. R. cubensis Griseb. 
