P l a t e CXX. B.
CALLITHAMNION ROTHII, Lyngl.
C a llith am n io n Eothii ; widely spreading, densely tufted ; filaments very
slender, short, erect, dichotomous or irregularly branched; branches
long, straight, appressed ; articulations twice as long as broad ; tetraspores
clustered, borne on short, subterminal, corymbose ramuli.
Callithamnion Eothii, Byngi. Hyd. Ban. p. 129. t. 41. Ag. Syst. Alg.
vol. ii. p. 185. Harv. in Hooh. Br. M. vol. ii. p. 347. Harv. Man. p. 116.
Wyatt, Alg.Banm. no. 188. Fndl. 3rd Suppl.'ÿ.34. Kiitz. Phyc. Gen. p. 471.
Cebasiium Eotliii, Berh. Gl. Br. Alg. t . 20.
T bentbpohlia Eothii, Harv. in Much. FI. Hib. part 3. p. 218.
C o n p e b ta E o th ii, Finn. Syst. Nat. vol. vi. p . 1 8 0 6 . Billw. Conf. t. 7 3 .
F. Bot. t. 1 7 0 2 . Jury. Alg. Bee. n o . 1 0 .
CoNEERVA violacea. Both. Cat. Bot. vol. i. p . 1 9 0 . t . 4 . f. 1. FI. Germ. v. iii.
p a r t 1. p. 5 2 5 .
/3. purpurea ; filaments very minute, forming continuous velvetty patches,
shghtly branched.
Ca l l it h a m n io n p u rp u re um , Harv. Man. p . 1 1 6 .
T b e n tb p o h lia p u rp u re a , Ag. Syst. p . 3 6 . Harv. in Hooh. Br. M. vol. ii.
p . 3 8 2 . Harv. inMach. FI. Hib. p a r t 3. p . 2 1 8 .
Byssus purpiu-ea, F. Bot. 1 . 1 9 2 .
Co n f e r v a p u rp u re a , Billw. t . 4 3 .
H a b . Spreading over the surface of rooks, about haW-tide level. /3. on
maritime rooks, within the influence of the spray, but beyond the
reach of ordinary tides. Perennial. Winter.
Geogr. D istr. Atlantic shores of Europe. Baltic Sea. East coast of North
America.
D e s c r . Filaments from a lin e to h a lf a n in c h in h e ig h t, very slen d e r, d en sely
p a c k ed to g e th e r in ex ten siv e v e lv e tty p a tch e s , o f a d eep r e d o r p u rp lish
r e d colour. Branches few, simple, a n d v e ry ere c t, th e low e s t lo n g e st, g en e ra
lly b a re o f ram u li. Tetraspores tw o to fo u r, o r freq u en tly th re e to g e th e r,
o n s h o rt p ed icels, g row in g from th e u p p e rm o s t jo in ts o f th e b ran ch e s.
Joints tw ic e as lo n g as b ro a d . Substance mem b ran a c eo u s, m o re o r le ss p e r fectly
a d h e rin g to p ap e r.
A smaller and more slender plant than the preceding, with
shorter joints, and well characterized by the difference in fructification.
I have ventured, I trust not without sufficient warrant,
to unite to C. Boihii the old Conferva or Byssus purpurea, which
I have long regarded as a stunted form, whose characters depend
on the situation in which it is found growing. In this opinion
I am supported hy Mr. Ralfs, an accurate and close observer, who
has had the best opportunities of investigating the subject.
Eig. B. Callithamnion E o th ii:— of the natural size. 2. Portion of a filament,
3. Apex of a branch in fruit. 4. Section of a branch with clusters of
tetraspores :— all more or less ma
A L P H A B E T I C A L I N D E X
VOL. I.
{The synonymes are printed in Italics)
Agardhia adhcerens, Cabrera . . .
Plate
35 A. Callithamnion nodulosum. Kg . . . .
Plate
106
dichotoma, Cabrera. . . . 93 Plumula, Lyngh 81
Agarum esculentum, B o r y ............ 79 Pollexfenii, Harv. . .. 81
Aglaiophyllum Bonnemaisoni,MdsIA. . . 23 purpureum, Harv. . 120 B.
Alaria esculenta, Grev.................... 79 Eothii, Byngb......... 120 B.
Alcyonidmm bullatum, Lamx. . .. 68 seirospermum, Griff. . . 21
Alsidium scorpioides, J. Ag........... 48 tripinnatum, Ag , 77
Anabaina marina, Breb............ 113 X versicolor, Harv. . .. 21
Arthrocladia viUosa, Buby ......... 64 Calothrix fasciculata, Ag. 58 A.
Asperocoecus buUosus, Lamx. , .. 11 pannosa, A g.................... . 76
compressus. Griff. . . . 72 scopulorum, A g ............. 58 B.
rugosus ß, Duby. . . . 11 Carmichaelia attenuata, Grev. . .. 25
Turneri, Hooh......... 11 Carpomitra Cabreræ, Kg............... 14
Bangia afro-purpurea, Ag............. 96 Catenella Opuntia, Grev. . 88
fusco-purpm-ea, Lyngb. . . . 96 Ceramium asparagoides, Eoth 51
Johnstoni, Grev.................. 54 B. Casuarinæ, DC............ .. 27
versicolor. Kg...................... 96 diaphanum, ß, Wyatt. .. 90
viridis, Oed........................ 54 B. eguisetifolium, DC. . . . 67
Batrachospermum attenuatumjion. . . 106 filamentosum, Ag......... 46
Belonia torulosa, Carm.................. 1 1 3 ^ . Filum, Eoth .............. 107
Bonnemaisonia asparagoides, Ag. . . 51 incurvum, DC............. 85
Bostrichia scorpioides, Mont . . . . 48 nodosum. Griff. & Harv . . 90
Bryopsis Arbuscula, Ag................. 119 oceUatum, Ag............... 40
hypnoides, Lan u ........... 119 pennatum, Oed............. .. 87
Byngbyeei, El. Dan......... 3 Plocamium, Eoth. . . . . 44
plumosa, Ag................... 3 plumosum, Eoth........... 80
Byssus purpurea, Sm..................... 120 B. rigidulum. Griff. & Harv . . 90
Callithamnion floccosum, Ag. . .. 81 scoparium, Eoth........... 37
floridulum, Ag. . .. 1 2 0 a / . tuberculosum, Eoth 69
gracillimum, Ag 5 verticillatum, DC. . .. 33
multifidum. Kg. . .. . , 27 verticillatum, Duel. .. 27