270 THE JOURNAL OF BOTANY 
a 
by about three concentric rings of radially ares tracheids. 
occur at varying distances near the phloem. e periderm is 
represented by about three layers of thin-walled rectangular cells. 
The stem anatomy of Wallich’s specimen presents no essential 
differences from the above , except that its first ok s xylem is but 
pigs ore the thickness of that in Rotula. 
Sections of specimens collected by Mr. Scott Elliot (No. 4718) 
in Siem eons and by agar (No. 1793) i in Brazil are precisely 
sim 
The young ‘Teaves of Loureiro’s gpecimen which come from 
the base of an ia are sepees? oblong-ovate, pene? slightly 
serrate and glabro The eolate-acuminate bracteole is 
ciliate along its gba and Stok bie applied to the calyx, which 
consists of five lanceolate-acuminate, slightly gamosepalous seg- 
ments ; these are 3:6—4:5 mm. long and ciliate. along their margins. 
nan unopened flower i style was seen to spring from the top 
of the pistil. The dry fruit is a globular schizocarp of four 
nutlets, slightly protracted at the apex and measures 2°5 mm. long 
2 mm. wide. allich’s Ussaaiaa differs in ne its — 
and fruit a little larger they easure respectively 4:5- 
and 3 by 2°5 mm.—and by the fesse bracteoles and calyx Gein 
hispid on the under surface. Scott Elliot’s plant, on the other 
hand, is. merely ciliate, as in the type of Rotula. 
Hence the examination of the type confirms the view pre- 
viously expressed by Bentham and Hooker and C. B. Clarke that 
Loureiro’s Rotula aquatica is identical with Rhabdia lycioides 
Mart., and the earlier gone must therefore take precedence. The 
synonymy is therefor 
RorTuLa AQUATICA Cte Fl. Cochinch. 121 (1790). 
Rhabdia ical Mart. Nov. Gen. et Sp. Pl. ii. 187, t. 195 
(1826) et au 
SHORT NOTES. 
“ FoLLOWERS OF Man” (p. 227). — Mr. Woodruffe-Peacock 
asks “ Why quarrel with Watson’s a of ‘casual colonist ’ 
as applied to Anagallis arvensis?” I hay nothing but admira- 
tion for Mr. Woo e-Peacock’s sakoutiher ts ethod of — 
out the necessary facts dealing with Ria cottragienl but itm 
be borne in mind that what is true of one area cannot be ie 
as a law for others soaps! = essentially different. Even some 
cornfield plants may be undoubted natives; of these Scleranthus 
pees may be one—I think tillage has increased its distribution 
