a i
O rd o XY. chondrieæ.
Chotidi'ieæ J. Ag. Symb. in Linn. XV. p. 20. Alg. med. p. 108.
D ecaisne Class, p. 64, Haro. Ner. a u str . p. 75 (mut. limit,
ap. omn.) l.omcntarieæ (mut. lim.) Endl. Gen. Pl. Suppl. IH.
p . 42. Mont. Voy. Poi. Sud. p. 122. Laurencieæ//arw. ¿w lond.
Journ. Pot. IV. p. 539. Phycol. Brit. Syn. p. XXII. Cliampieoe,
Dasyeæ, Gelidieæ, Polysiplionieæ et Chondrieæ (quoad partes)
Kütz,. Phyc. et Sp. Alg.
Frons inarticolata, filis aut cellulis non e regione positis contoxta,
axi centrali sæpe percursa. C y sto ca rp ia nucleo frondi immerso
constantia aut pericarpio externo munita; fila gemmidiifera
invicem libera, a placenta basali radiantia, in articolo
terminali clavato transformato gemmidia pyriformia foventia.
Sphærosporæ strato corticali immersæ, sine ordine sparsoe aut
aggregate.
Algæ tenuissime membranaceæ (Bonnemaisoniæ, Lomentariæ
sp. etc.) aut eximie cartilagineæ (Laurenciæ sp. etc.), colore car-
neæ, coccineæ, purpurascentes ant expositione atrovirentes vel immo
lutescentes, forma nec minus variæ; aliæ teretiusciilæ dichotomæ
(Polyides, Solieria), aliæ teretiiisculæ quoquoversum pinnato-ramosæ
(Lomentariæ et Laurenciæ spec.), ramis vagis, alternis, oppositis aut
verticillatis; aliæ complanatæ distiche ramosæ (Laurenciæ sp. Pti-
loriia) aut cibato- I. serrato-pectinatæ (Bonnemaisonia, Delisea) ; aliæ
penicillatæ (Asparagopsis) ; frondes mine tubulosæ, tubo aut continuo,
sed filo axili percorso (Bonnemaisonia, Asparagopsis), aut diaphrag-
matibus cellulosis iiitercepto (Lomentaria); nunc solidescentes, ant
filo centrali destitute (Solieria, Polyides, Laurencia, Ptilonia) aut filo
centrali percursæ et plus minus evidenter costate (Delisea). Cellulæ
frondem constituentes per 2 vel 3 strata plus minus distincta dis-
positæ sunt; intimum stratum in iis, quorum frons 3bus stratis
contoxta est, aut filo centrali angusto articulato et ramoso (Asparagopsis,
Bonnemaisonia, Delisea) ant filis plurimis articulatis ramosis
vel anastomosantibus (Ptilonia, Solieria, Polyides) constat; in frondilms
tubulosis et articolatira constrictis (Lomentaria) tubus, cæterum
vaciuis, filis sparsissiinis anastomosantibus perciirritur. lu fronde
cellulosa (Laurencia) cellnlæ medulläres a cellulis exterioribus vix
forma distinguendæ sunt. Cellnlæ interiores, cujusciimqiie forinæ sint,
ciim vicinis alternant (noe ut in Bliodoinelois e regione disponuntur ita
lit apices cellularum omnium lu idem planum horizontale desinant).
Gelluloe strati corticalis in cellulis intorioris sirati verticales, aut unica
serio dispositæ aut pluribus et in illa moniliformia conjunctæ.
Organa fructificationis triplicis generis observata fuerunt, Cystocarpia
nempe, Sphærosporæ et Antberidia. Cystocarpia nunc frondi
omnino immersa (Solieria), nunc iii Spongiolis extra frondem proe-
mi.nontibus nematliecia æmiilantibus evoluta (Polyides), nunc et sæpiiis
pericarpio proprio munita; Carpostomiuni, ni fallor, semper adnst.
Nucleus filis constituitur plurimis, invicem liberis, clavæforinibus, a
placenta basali sursum et quoquoversum radiantibus, unico articulo
fere constantibiis aut basi articulatis decompositis apice in articii-
lum elongatum clavæformein desinentibus; gemmidia in articulo
terminali intra periderma hyaliniiin evoluta, singula, obovato-pyri-
formia, nuno plus minus davala vel obconica; matura relicto peridermate
et e daiistro erupta magis rotundata evadunt, denniinqne
germinantia obsérvala fuerunt. (Cfr. J. Ag. in Act. Holm. 1836 p.
46, et Ann. Sc. Nat. 1836 Oct.) Fructus liiijns generis nomino
proprio Keramidii designavi.
Sphærosporæ transformatione lilorura aut cellularum subcorli-
calium ubiciimquo formantur.» Soepissime inter cellulas aut fila frondis
vix mutata evolute, sparsæ vel plus minus aggrcgafæ (Lomentaria,
Laurencia, Polyides, Solieria); rarius, quantum innotuit, in verriicis
nematlieciosis extra frondem proeminentibus obvenientes (Delisea);
in piuribiis generibus nondiim cognite (Bonnemaisonia, Asparagopsis,
Ptilonia). Nucleus sphærosporæ spliæricus, spliæroideus aut immo
oblongus, maturus in sporas 4 triangule (Lomentaria, Laurencia),
criicialim (Polyides), ant zonatim divisus (Solieria, Delisea). De ger-
minatione cfr. J. Ag. l. c.
A n t b e r i d i a i n u n i c o g e n e r e L a u r e n c iæ h i i c u s q u e c o g n i t a ; i n t r a
r e c e p t a c n i u m s c u t e l l i f o rm e p l u r im a c o l l e c t a , a m b i t u c y i i n d r a c e o -
S L ib p y r amid a ta , s i n g u l a c e l l u l i s p l u r im i s m i n u t i s s im i s c i r c a a x i n d i s p
o s i t i s c o n s l a n l i a .
111. 47