Petals 4 or 5, the two uppermost widely obovate, 
deeply notched at the point, or nearly obcordate, of a 
cream colour, with numerous reddish purple lines 
which branch from the base, lower ones very small in 
proportion to the others, widely spathulate. Filaments 
10, seven bearing anthers ; /er^zYe ones joined at the 
base, slightly hairy ; and spreading at the points ; 
sterile ones much shorter, erect, and subulate. Pollen 
of a brown colour. Germen villous. Sti/le quite 
smooth, flesh-coloured. Stigmas 5, red, refiexed. 
Our drawing of this very rare and curious plant 
was taken from some flowering specimens kindly com- 
municated to us by Sir R. C. Hoare, who we believe is 
the only person that has possessed it in this country for 
some years past : we think it sufliciently distinct 
from all others that we are acquainted with to form a 
distinct genus, which we have the pleasure of naming 
in compliment to Robert H. Jenkinson, Esq. whose 
collection of Geraniacese promises soon to vie with any 
in the country, and to his liberality in dilfusing them 
to other collections we bear frequent witness. It ap- 
proaches nearest in character to Chorisma*, but differs 
from that in having 4 aad 5 petals, the 2 upper 
ones with scarcely any unguis and deeply emargi- 
nate; the shape and direction of the filaments is also 
different, besides its habit. It is a very handsome plant, 
but is rather more tender than most of the tribe, re- 
quiring a cool part of the hothouse or a warm part of 
the greenhouse to protect it in winter, when it needs 
but little water. We find it thrive in an equal mix- 
ture of loam, peat, and sand; and cuttings are not 
difficult to root if planted in pots in the same kind of 
soil, and set in a shady part of the greenhouse. 
* Chorisma. Pet. 4, duo superiora longe unguiculata majora. 
Stam. in tubo longissimo decUnato medio geniculato connata, 7 ferti- 
lium duo inferiora libera, 3 sterilia abbreviata subulata aequilonga. 
Lindley MSS. (Pelargonium tetragonum. LHerit.) 
