520 En-Florldea-, Gigartiiiea?, Gigartina. 



Var. latifolia J. Ag. Epicr. p. 685: frondibus supra stipitem re- 

 niformiter dilatatis latissimis, superne subpalmatiui laciniatis et a 

 margine phyllis sa^pe plurimis prolificantibus obsitis. 



B. Froiidis vaa-e subdivis^e segmentis in rachide demura lateraUbus subpinna- 

 tim dispositis. 



49. Gigartina Jardini J. Ag. Bidr. Florid. Syst. p. 9, Epicr. p. 200, 431 

 Gigartina lanceolata J. Ag. mscr. — Fronde subcanaliculata, plana, 

 lineari, subpinnatim decomposlta, segmentis sapra l)asin angustio- 

 rem linearibus elongatis apice truncxtis dentatisvo, papillis a disco 



et margine prolificantibus lingiilato-lanceolatis, cystocarpia singula 

 submutica infra apicem gerentibus. 



Hah. ad oras California? (Herb. Lenorm.\nd). — Est quasi 

 Gigartince mamilloso3 forma magis elongata, fere pinnatim com 

 posita. 



50. Gigartina microphylla (Harv.) J. Ag. Epicr. p. 200, Iridcm? mi- 432 

 crophylla Harv. in Hoolv. Bot. of Beechey Voyage p. 164, Ner. bor. 

 Amer. p. 176, t. 28 A, Mastocarpus Harveyanus Kuetz. Tab. 

 Phyc. XVn, t. 45. — Fronde plana, supra stipitem longiorem sub- 

 vage laciniata prolificationibusque a disco et margine pullulantibus 

 demum subpinnata, segmentis majoribus elongato-lancoolatis, mi- 

 noribus linearibus, papillis a disco et margiue undique emergenti- 

 bus; soris in papilla marginalibus; cystocarpiis in papilla rostrata 

 solitariis aut numerosis, singulis infra rostrum com nune muticis. 



Hah. ad oras Californiffi (Beechey, Coulter). — Frondes usque 

 ad 30 cm. longa?; substantia coriacea. 



51. Gigartina splnosa (Kuetz.) J. Ag. Epicr. p. 200, Mastocarpus 433 

 spinosus Kuet/. in Bot. Zeit. 1847, p. 21, Sp. p. 734, Tab. Phyc. 

 XVH, t. 47, Harv. Ner. bor. Amer. p. 177, tab. XXVIH B, Gigar- 

 tina ornithorynchos J. Ag. Sp. II, p. 274 partim, Irid(m stiriata 

 Harv. in Hoolc. Bot. of Beechey Voyage. — Fromle plana, supra 

 stipitem breviorem cuneato-lanceolata, superne vage aut subpal- 

 matim laciniata, prolificationibus a margine excrescentibus demum 

 subpinnata, segmentis majoribus elongato-Ianceolatis, minoril)Us 

 sublinearibus, papillis a disco et margine undique emcrgentibus; 

 cystocarpiis in papilla solitariis aut pluribus, singulis spinoso ro- 



stratis. 



Hab. ad oras California! (Coulter, Donglas). — Frondes a disco 

 radicali cxsurgunt numerosa), us^iue ad sesquidecim. longre, basi e te- 

 reti conqjressa", mox plame ot obsoletius canaliculatoe, scnsim latiores 



I 



