PENNELL: PLANTS OF SOUTHERN UNITED STATES 339 
Mexican, extending into southern Arizona, but, so far as I am 
aware, not before reported from the Gulf States. 
LESPEDEZA HIRTA (L.) EIl. 
Dry sandy oak-woods west of Sheridan, Colorado County, 
Texas, collected = September 21, 1913, 5523. 
GALACTIA MARGINALIS Benth. Ann. Wien. Mus. 2: 126. 1838 
Perhaps G. heterophylla (Gill.) Vail (Bull. Torrey Club 22: 
502. 1895), but not G. heterophylla A. Gray (Boston Jour. Nat. 
Hist. 6: 171. 1850). 
Sandy soil, one mile east of Aloe, Victoria County, Texas, > 
September 18, 1913, 5497- 
THE GENUS CHAMAECRISTA Moencu IN THE UNITED 
STATES 
During my two southern trips especial attention was given to 
the genus Chamaecrista Moench. This genus or, if you will, 
subgenus of Cassia L. has long been known as of particular taxo- 
nomic difficulty. As long ago as 1871 Bentham in his revision of 
Cassia emphasized this. Hence it has seemed desirable to see 
living plants and to study the behavior of the several species. 
From the following lists the extent and deficiencies of this 
field-work will be apparent. I have collected nearly all the species 
in my course, but, as I did not travel west of central Texas or south 
into the Florida peninsula, I have seen but six of the thirteen species 
here recognized. 
However, these six include all of the wide-ranging, widely 
variable sorts, and, as in this genus the characters of diagnostic 
value preserve well, the main importance of field-study has been 
to form some appraisement of variation within and between 
species. Of the geographic subspecies here treated, six in all, 
the writer has collected three. 
Corolla large, exceeding 1 cm. in di petal only 
moderately longer than remaining four. Stamens 
10. Pedicels 1-8, 7-40 mm. long. 
Perennials. 
Petiolar gland slender-stalked. 
Leaflets 7-9 mm. long, rounded-mucronulate, 
