Vermischte neue Diagnosen. 29 
23. Crataegus cuneato-trifida Loj. Poj. l. c. p. 215. 
Glaberrima, ramis hornotinis brevibus parce foliatis, vetustis subtor- 
tuosis,. cortice livido-fusco tectis, parce spinosis, spinis brevibus, rectis 
patentibus axillar. 2 em longis, foliis parvis, maxima copia integris, reli- 
quis cuneatis, trifidis, lobulis (apicalibus) integris v. parce inaequaqualiter 
minute dentatis, aliis ad ramulos steriles verisimiliter pertinentes late 
ovato-cuneatis, sub-5-lobis, racemis pauciflor. flor. 3—6 e maximis, diam. 
circa 14 mm, petalis amplis cochleatis insigniter tenue unguicul. denticul.- 
plieatis, sepalis late brevissime ovato-triangulis, obtusiusculis, florescentia 
glaberrima, pedunculis laxissimis elongatis, stylis 2, foliorum lobis exilibus 
aliquando margine serrul., supra glaberrimis, subtus opacis insigniter 
discoloribus, maxima copia integratis! 
Habitus peculiaris; vix ad C. thyrsoideam Gand. approximandus, sed 
florescentia diversissima et videtur media inter C. trilobam Poir. et C. 
Oxyacantham. 
Sicilia: In dumetis elatioribus Val Demone, Serre di Cannata all 
Acqua Santa Cit.! in Herb. Tod.! Castelbuono a S. Guglielmo Lojac.! 
Majo 1904. 
24. Cr. parvifolia Loj. Poj. l. c. p. 216. 
, Trunco valido, cortice laevi fusco-olivaceo tecto, ramis junioribus 
fuscis gracilibus creberrimis florigeris, spinis 1!/; cm longis, crebris, 
testaceis, foliis parvis multis fasciculatis, petiolis ratione limbi longis, 
gracilimis undique brevissimi lanuginosis dein glabratis, corymbis brevi- 
bus parvis densis, compactis, pedicellis divisis, uti calyx dense albo- 
lanuginosis, stylis... 
Folia membranacea minuta (14 mm lata X 16 mm longa), e basi la- 
tissima cuneata trifida v. tripartito-lobata, lobis lobulatis, v. dentatis, v. 
deorsum minute serratis, apiculatis. 
Sicilia: In Val Demone Herb. Pan! 
X. Vermisehte neue Diagnosen. 
156. Holstia nov. gen. fossile Potamogetonacearum O. Hagstróm in Geol. 
Fóren. Fôrh., XXVIII (1906), p. 90. — Species unica: Holstia splendens 
O. Hagstróm, L c., p. 90, tab. 3.*) 
Caule glaberrimo laevi spadiceo complanato marginibus pellucidis, 
nodoso internodiis + 5 cm longis 5—8 mm latis, foliis sparsis vaginan- 
tibus ochreatis. 
Flowers and fruit are not found. The anatomie of the stem differt 
this plant from the genus of Potamogeton to which it is nearly allied; the 
bastcells are combined into commonly broad ribbonlike formations. But 
endodermis and central cylindre in propre sense are not te be found. 
*) Descriptio ab auctore translata. 
