Geology and Natural History. 375 
‘versity, me Professor of Modern Languages. The general matter, 
_ which makes the principal staple of this Report, is of consider- 
ses 
> carping trite. Our attention is concentrated upon the list of new 
species, twelve in number, which we enumerate, appending the 
: ; 
Megane is & maculata L., a pretty well-marked, more 
t, and smoothish variety, of our southern coast. 
Sabbati nana is S. gracilis Pursh, a dwarf form, approach- 
ing S. stellaris. 
8. oligophylla i is a slender state of S. gentianoides Ell. 
Hydrolea leptocaulis is H. ane Gray, Manual, ed. 5. 
. Ludoviciana is H. ovata Nut 
Jussicea oydiana is J. repens L. a small form. 
Tephrosia. angustifolia, from the drawing is probably only 
t. 
T. multifiora is T. onobrychoides N won 
Lilium Lockettii is Crinum Americanum UL. 
nothera paludosa, for lack of povoet ees and drawing, is not 
made out. 
Vitnnen Seminariense is H. nudiflorum Nutt., = is, 
Leptopoda bra ee Torr. and Gray. G. 
7. Dr. Rohrbach on Typha.—Dr. pak ha ch, the shcintierbaiide 
of Silene, of Berlin, has published a careful revision of the genus 
hu. “He recognizes 9 species, with 4 sub-species: 7 of the 
former are found in Europe, and 2 of these also in the territories 
of the United grat ogee with a sub-species, peculiar to the 
Warmer parts o 
Dr. R. has discovered that nad fruits of 7 of the 9 re show 
The othar ee on which he relies to distinguish the 
Species are (1) the shape of the stigma, which is linear, spatulate 
or rhomboid ; (2) the presence or absence of bracts (vari riable in 
Shape in the same species) at the base of the female flower ; 
(3) the proportional length of the stigmas, the perigonial hairs, 
and the j entioned. bracts, at the period of maturity of 
et (4) the presence or absence a a on the axis of = 
_ lnale inflorescence ; (5) the pollen, whether in single 
: penne united re te Seacseical structure of the seed seek: 
* The specie th adnate pericarp a: T. Lawmanni Lepechin (the earlier 
‘name for 7. suet Be Sm.), throughout mi Sogo — Europe and Asia; and 
4: stenophylla F. & M. iieniae from aa into I 
