D. LUIZET. — CONTRIBUTION A L'ÉTUDE DES SAXIFRAGES. 87 
Le double rapprochement que l'on peut faire des formes des 
X Sax. capitata Lap. et »« Sax. ciliaris Lap. confirme, de la 
plus heureuse facon, l'origine hybride de ces deux plantes. 
Diagnoses latines. — »« Saxifraga capitata Lap. «. pauciflora Luiz. — 
Laxe cæspitosa, caudiculis indeterminatis basi humifusis atque radican- 
„tibus, apice erectis atque dense foliosis; caulibus floriferis 4-4 subtus rosu- 
lam foliorum terminalium atque rosulas steriles axillares nascentibus, 4-8 cm. 
altis, 4-4-floris. Folia majuscula glabrescentia, pilis sparsis plus minusve 
marginata, haud sulcata, nervis haud prominulis, limbo cuneato pro- 
funde tripartito, in petiolum attenuato, lobis lanceolatis 2-3-4-fidis, acutis; 
caulina sæpius 3-5-fida; superiora, bracteæ atque prophylla linearia 
integra acuta. Scapi, pedunculi, pedicelli atque calyces, pubescenti-glan- 
dulosi. Petala alba subelliptica, laciniis calycinis duplo longiora atque 
latiora, trinervia. Calycis laciniæ, tubo primum longiores, ovatæ, acute. 
Stamina atque styli lacinias valde superantia. 
— Xx Saxifraga capitata Lap. B. S. Borderi G. Rouy et G. Camus. — 
" Robustior caudiculis crassioribus minus numerosis, basi supinis, apice erectis 
atque laxe foliosis; caulibus floriferis sublerminalibus, erectis, e basi panicu- 
lato-ramosis, 15-25 cm. altis, multiftoris, pedunculis elongatis 1-5-floris. 
Folia majuscula glabrescentia, pilis sparsis plus minusve marginata, 
haud sulcata, nervis haud prominulis, limbo cuneato profunde tripartito, 
in petiolum planum attenuato, lobis lanceolatis 2-3-4-fidis, acutis; caulina 
atque bracteæ sessilia, profunde tripartita, lobis cuneato-lanceolatis, 2-3- 
fidis vel integris acutis; prophylla lanceolata integra acuta. Caules, pedun- 
culi, pedicelli atque calyces, glanduloso-pilosi. Petala alba obovato-oblonga 
laciniis calycinis duplo longiora atque latiora, trinervia, Calycis laciniæ 
ovatæ, acutæ, tubo æquilongæ. Stamina atque styli lacinias valde supe- 
rantia. 
— x Saxifraga ciliaris Lap. «. pauciflora Luiz. et Neyr. — Cæspitosa. 
caudiculis indeterminatis, basi supinis, apice erectiusculis atque dense foliosis, 
caulibus ftoriferis terminalibus vel subterminalibus, 4-6 cm. altis, 1-5-foris 
cymosis. Folia suprabasilaria glabra, sparsim ciliata, lanceolata obtusa ve 
obtusiuscula; basilaria cuneata in petiolum attenuata, tripartita, lobis ovato- 
linearibus integris obtusis vel obtusiusculis; infrabasilaria cuneata subses- 
silia, tripartita, lobis integris brevioribus atque latioribus ; caulina, ut 
bractea inferior, sepius sublinearia integra obtusa; prophylla linearia 
integra obtusa. Caules floriferi, pedunculi, pedicelliatque calyces, breviter 
glanduloso-pilosi. Petala alba vel luteo-albida subelliptica, laciniis ca y- 
cinis duplo longiora atque latiora, trinervia. Calycis lacini triangulari- 
ovatæ, tubo æquilongæ, obtusiusculæ. Stamina atque styli lacinias sup 
rantia. 
— x Saxifraga ciliaris Lap. 5. S. Ram 
tosa, caudiculis basi supinis, apice erectis d 
vel subterminalibus, 4-11 cm. altis, e basi l e 
corymbosis, 8-10 floris, pedunculis inferioribus remotis vel elongatis. Fora 
Suprabasilaria cuneata in petiolum attenuata, plerumque. apr ME 
lobis triangularibus obtusis, inferiora tantum lineari-lanceolata in eg obtusa; 
basilaria cuneata subsessilia, apice tripartita, lobis sublinearibus S, 
ondii Luiz. et Neyr. — Cæspi- 
caulibus floriferis terminalibus 
go ramoso-paniculatis vel 
