26 BOTANICAL GAZETTE. 



urn is ticketed "flowers yellow"; the other "flowers golden yellow." 

 Both are from the Irish Bayou settlement [N. E.] Texas," and though 

 Dr. Leavenworth tliought they might be distinct species, they differ 

 only that one has all the peduncles radical and one-flowered, while 

 the other is subcaulescent with central peduncle few flowered. The 

 petals show no trace of the yellow color, but rather seem to have 

 l)een white with a purplish tinge. 



Of the second species, described from Dr. Short's Kentuckian 

 specimens, Dr. Torrey could only say that the flowers in his opinion 

 were pale yellow. Dr. Short does not record their color, either in 

 the specimens he sent to Dr. Torrey or in his own herbarium. But 

 all the specimens received of Z. Michauxii, that is all with an even 

 and rather broad silique and a very short or almost obsolete style, have 

 white or purplish tinged petals with at most a yellow base. But the 

 same is true of all the specimens (of which the color is noted) received 

 from Alabama, Tennessee, etc., which, having their ob'ong-linear or 

 lanceola'e pods surmounted by a distinct and rather slender style, 

 were taken for L. aurea; also in plants raised here from seeds in 

 different years. At most the base or claw of the petals was yellow, 

 the lamina white varying to purple. Accordingly, in the Manual, 

 neglecting the style, and the embryo, I referred all these to L. Michauxii, 

 and reduced L. aurea to a synonym or a yellow-flowered form of it. 



But now, with all the available material before me, including a pe- 

 culiar yellow flowered form recently detected in Tennessee by Dr. 

 Gattinger, I am disposed to recognize four forms as probable species, 

 and I will here note their distinctions, making at the same time an ap- 

 peal for further information before coming to a full conclusion. The 

 forms or species before me are as follows: 



T. L. Michauxii, Torr. Silique oblong-linear, not torulose; sty'e 

 very short or none; seeds orbicular and rather broadly winged; radi- 

 cle very oblique, approximated on one side to the edges of the coty- 

 ledons; petals white with purplish tinge and a yellowish claw. — (Ten- 

 nessee, on rocks at Knoxville, Michaux, if this is indeed Cardamine 

 uiiifioni, Michx., but I have noticed that his specimens have a distinct 

 but shorts'yle.) Barrensof Kentucky, Short. Charlestown, Indiana, 

 J. 3f. Cou/ier. 



2. L. AUREA, Torr. Silique oblong-linear or narrower, not torulope; 

 style conspicuous, commonly as long as the breadth of the silique; 

 seeds of the preceding; but the radicle merely oblique, sometimes 

 slighdy so. peta's of the preceding or yellow! — Arkansas and N. E, 

 Texas, Leavena-orth, with flowers said to be yellow. Alabama, Buck- 

 ley, Hatch, Peters, etc., with petals purple, pale rose, or white, with 

 yellowish base, sometimes fully half inch long. 



L. TORULOSA. Silique linear, conspicuouslv torose; style fully 

 equalling the breadth of the silique; seeds broadly oval, narrowly 

 winged; radicle nearly transverse, strictly applied to the edges of the 

 cotyledons at the base on one side; petals purplish with a yellow 

 base. — Barrens of Kentucky, Short. Very abundant near Nashville, 

 Tennessee, Dr. Gatthiger. 



L. STVLOSA. Slender, strictly stemless; silique or rather silicic 



