180 PITTONIA. 
knowledge of the plants under consideration, knew no Eupa- 
torium with leaves linear, entire and one-nerved; nor is 
there any evidence that Linnæus did. So I find it impossi- 
ble not to accept the following as a good species : 
E. LINEARIFOLIUM, Walter? DC. Prodr. vi. 177. Over 
and above its characters of a dark green herbage, narrowly 
linear 1-nerved leaves, and abundant axillary leafy branch- 
lets, this speeies has the peculiarity of a thick fleshy fusi- 
form or tuberiform root, at least in certain localities; 
though I am not sure that we have not still, even with the 
southern fibrous-rooted E. lechexfolium excluded, a num- 
ber of species under this name. It is more common than 
true E. hyssopifolium, under which name it is held in most 
of the herbaria. 
E. sucunpum. E. incisum, Chapm. Fl. 3 ed. 216 (1897), 
a name precluded by the E. incisum, Rich. Act. Soc. Hist. 
Nat. Par. i. 112 (1792). 
9. The Genus MESADENIA. 
The natural group of plants forming the basis of the genus 
Cacalia is African and East Indian. The species are shrubs, 
with stout half-fleshy stems and succulent foliage, forming 
an assemblage of cactaceous composite, so to speak. Several 
of them are, and for a century or two have been, cultivated 
in conservatories and collections of curious exotic suceu- 
lents. With these, our several well known perennials 
of the Eastern and Southern States have no very near 
affinity; and their marked habital peculiarity and floral 
characters long ago led several of the most discerning among 
systematists to segregate them from Cacalia. Their marked 
disagreement with that genus seems first to have been in- 
dieated by Cassini in 1827;! and with a sagacity that has 
UMSO UH ue ee v pter 
| Dict. xlviii. 460. 
