328 SERTULUM CHINENSE TERTIUM: 
Orchis conopsea, L.—This is rare near Plymouth, and seems to be 
very uncommon in Devon generally. It was not known to the authors 
of the * Flora Devoniensis' as a plant of the county. In June last I 
noticed about a dozen specimens growing in an elevated part of Caun 
Plantation, where the Scotch Firs were not thick enough to cause 
deuse shade, and at least treble that number in a heathy piece of 
ground on the other side of the stream below the plantation. I have 
already recorded it from Roborough Down, where it still grows. . 
Habenaria bifolia, Br.—Several plants in the heathy piece of ground 
that produced the last species. H. chlorantha, Bab., is rather common 
about Plymouth, but H. bifolia is rare. 
On two or three occasions during the past summer I have thought it 
worth while to look for Arabis petrea, Lam., on Wigvor Down, as this 
place is given as a station for it in the ‘Flora Devoniensis’ (on the 
authority of Hudson and a Sir Francis Drake) in the following 
words :—“ Wigvor Down, near Meavy, between the gully and the gate 
leading to Greenvil Farm." I found the gully, gate, and farm, but 
not the Arabis. 
4, Portland Villas, Plymouth ; September 17, 1868. 
SERTULUM CHINENSE TERTIUM: A THIRD DECADE OF 
NEW CHINESE PLANTS 
By H. F. Hance, Pu.D., ETC. 
921. Xylosma senticosum, n. sp.; suffrutescens, humile, dumosum, 
caule cortice albido obducto, ramulis castaneis tomentellis, foliis bre- 
vissime petiolatis glaberrimis supra nitidulis subtus pallidioribus exacte 
ovatis 6-8 lin. longis acutiusculis margine revolutis parce incumbenti- 
serratis serraturis obtusis glandulosis, spinis axillaribus rectis gracile 
acicularibus foliis dimidio brevioribus vel iis nune eequilongis, racemis 
masculis 5—7-floris foliis brevioribus, bracteis oblongis obtusis subcu- 
cullatis, sepalis rotundatis margine ciliato excepto glaberrimis sym- 
ptyxi decussatim oppositis, staminibus cire. 20.— Juxta viam ad sum- 
mitatem montis Victorie ins. Hongkong ducentem, semel tantum in- 
veni, m. Augusto 1861 (Exsicc. n. 7437). 
Mr. Bentham, to whom at the time of its discovery I communicated 
