498 I’HE BOTANICAL EXCHANGE CLUB OF THE BRITISH ISLES. 
X 368. CeRASTIUM ALPINUM X NIGRESCENS = C. BlYTTII, 
Baenitz. Plant less woolly, leaves more acute and greener, with 
shorter pubescence ; upper bracts with distinct membranous margin ; 
seed often (always ?) abortive = C. alptmm, vax. pubescens Syme, p.p. 
Planta minus lanata, foliis acutioribus et viridioribus, pubes- 
centia breviore, bracteis superioribus cum marginibus plane mem- 
branaceis. Seminibus saepe (semper ?) abortivis. Ben Heasgarnich, 
Ben Lawers, Scotch Mountains. G. Claridge Druce. 
• 
X 368. C. ALPINUM X vulgatum = X C. Symei, Druce, in 
‘Ann, Scot. Nat. Hist.’ 43, 1911, Plant less caespitose, usually 
more erect, with narrower leaves, which are less hairy, the hairs 
shorter, and nearly eglandular, Planta minus caespitosa, plerumque 
erectior, foliis angustioribus et minus hirsutis, capillis brevioribus 
et paene glandulosis. Ben Lawers, 88 ; Ben Laoigh, 98 ] Aonach 
Mor, 97 ; Braeriach, 96 ; Glen Aan, 94 = C. alpimtvi, var. pubes- 
cens, Syme, p.p. G. Claridge Druce. 
X 369. C. NIGRESCENS X VULGATUM = X C. RiCHARDSONII, 
Druce. Plant prostrate, ascending ; leaves narrow, acute, pubes- 
cence sparse, sparingly glandular ; flowers large. Planta prostrata, 
ascendens •, foliis angustis acutis, pubescentia rariore, vix glandulosa. 
Flores magni. Clogwyn, Snowdon. 
There is no type specimen of Boswell-Syme’s var. pubescens 
in his herbarium, now in the possession of Mr. F. J. Hanbury. 
G. Claridge Druce. 
374 b. Cerastium tetrandrum, Curtis, var. zetlandicum, 
Murbeck, in ‘Studier Ofver Kritiska Kiirl variformes,’ p. 258. 
Recedit a planta typica internodiis praesertim inflorescentia abbre- 
viatis pedunculo fructu maturo paullo brevioribus. Shetland. 
S. Murbeck. 
370 i. Cerastium vulg.a.tum, L., *var. nemorale, 
Uechtritz, in ‘ Oester. Bot. Zeit.’ 79, 1868. Plant robust, 3 — 5 
dcm., leaves large and rather broadly oval, more or less hairy ; 
peduncles, pedicels, and calyces clothed with glandular hairs. 
See Rouy & Fouc., ‘ FI. Fr.’ iii. 207. Plants well coming under 
this description grew on the Fen dyke between Peakirk and Crow- 
land, Northants, G. Claridge Druce. 
