NOTE ON TETRATHECA. 199 
pink and curiously frosted; the throat hairy with a deep pink spot in 
the shape of a star, the rays of which extend between the segments. 
30. Borreria discolor, Bartl.—DC. Prod. vol. iv. p. 545? 
31. Spermacoce hispida, Linn.—DC. Prod. vol. iv. p. 555. 
32. Knoxia corymbosa, Willd.—W. et Arn. Prod. vol. i. p. 439. 
Of the above three last species there are single specimens only, with- 
out the precise localities. 
In the recent numbers of Walpers’ * Annales Botanices Systematicæ ` 
Mr. Hance has described two additional Rudiacee* from Hong-Kong, 
Gardenia daphnoides, Hance, which differs in inflorescence and in its 
tetramerous flowers from all Gardenie known to me, and Galium soro- 
rium, Hance, evidently very near to if not identical with some of the 
forms of the common G. Aparine, which is now found in almost every 
part of the globe visited by Europeans. 
(To be continued.) 
Note on TETRATHECA ; by Dr. Asa Gray. 
In an article of some interest on the ‘ Organogénie de la Classe des 
Polygalinées,’ in the * Annales des Sciences Naturelles,’ no. 6 for 1851, 
M. Payer states, that Mr. Brown characterized the two genera on which 
he founded his Order Zremandree thus :—Tremandra, by the quinary 
symmetry of the flower, the uniovulate cells of the ovary, and the de- 
hiscence of the anthers at the summit by a pore; Teératheca by its 
quaternary symmetry, biovulate cells of the ovary, and the stamens 
opening at the extremity of the tube. And, he proceeds to remark, that 
the first and third of these characters are of no value, and that the 
second “ repose sur une erreur." E" 
That Mr. Brown should commit a mistake of this kind is so unlikel 
that it naturally calls attention to the statement, especially as the 
authority of Mr. Steetz, who has attentively studied this small group, is - 
* The preceding numbers of vol. ii. of Walpers' ‘Annales’ reached this country after 
the publication of the previous portions of the present Florula. They contain diagnoses —— 
of several Hong-Kong plants considered by Mr. Hance as new. ned oh oid 
appear to be old species, which the want of means of comparison in herbaria = 
prevented him from recognizing; others will be found to be identical with some 
the new species described in this Florula under other names. T delent 
ever, which, judging from the characters given, I do nof at all recognize in . 
lections before me. bur 
