Halymenia lapathifolia Kütz.

^2-L^[y~jL

HERBARIUM OF THE NEW YORK BOTANICAL GARDEN

*?>»

iJlj- jo

[7^ ^	................

§Ui

Vâ^

NEW YORK BOTANICAL GARDEN

00900207

Rijksherbarium/Hortus Botanicus. Leiden. The Netherlands.

Nom: Sebdenio lophatifolio

Remarks: Its internal strructure is quite diferent to Sebdenio

genus. It belongs to Cryptonemia genus (see Acleto)

Emilio Soler Onis, August 1995.

if/"	/¿¿tz

% .	O

sfX?

(

ht

C/j/

i/XD/cZ-'Cc/ ??

sctA

/tu£

¿-

a-

J&

<2/

!Îcc,fy

--—-

-----

;ldt

.yCtJL'yy\J .

'V

QJ.O /

Sf,

C.

id ???<.{ 4^ ^-
"it

¿s

Sebdenia

Sebdenia lapathifolia (Kiitz.) comb. nov.

Halymenia lapathifolia Kiitz. Tab. Phyc. 16: 35. pi. 99? 1866.
Halymenia elongata Kiitz. Sp. Alg. 718. 1849. Not Halymenia

elongata Ag. Sp. Alg. 209. 1822.

Thallus elongate-lanceolate (type specimen about 35 cm. long
and 6 cm. in greatest width), often pertuse, the margins subentire,
slightly undulate, or very sparingly short-lobed or dentate at base
and apex (sometimes proliferous?), membranous, 110-205 m thick;
medulla somewhat compact or rather loose and subvacuous, com-
posed chiefly of filaments 3-7 /x in diameter with granular proto-
plasts and imbedded in a hyaline mucus, terminating distally in
ellipsoid enlargements 8-14 n in diameter; cells of subcortex in
4-6 layers, the inner 10-20 n in longest diameter (parallel to
surface), the outer smaller, gradually more compact, 4-8 /x in
longest diameter; cortex proper very firm and compact, 2-5 cells
thick, its cells in distinct anticlinal rows or appearing somewhat
irregularly pseudoparenchymatoLis in section; the superficial cells
4-10 ¡j, high, 1-2 times as high as broad, die outer walls thin and

163

/{,2_ IU 3

firm (1-2 m thick), the cells polygonal and 5-8.5 n in maximum

diameter in surface view, with narrow very sharply defined
limiting walls; cystocarps minute, immersed, slightly or not at all
protuberant, the spore-masses subglobose, 55-85 ¡j. in diameter,
provided with a moderately well-developed involucre (pericarp).

“Lima (v. s. in herb. Binder).” Not collected by Dr. Coker.

This, like the preceding species, has been known only from the
brief description and very good figures published by Kiitzing, and
has been mentioned by succeeding writers among “species in-
quirendae.” The species, it seems, is no longer to be found in
herb. Binder, but the evident type, figured by Kiitzing, is in the
Kiitzing herbarium, now owned by Madame Weber-van Bosse of
Eerbeek, Holland. The thin, firm, very clearly defined limiting
walls of the epidermal cells are a striking characteristic of the
species. Grateloupia Cutleriae, of identity or affinity with which
the species has been suspected, has a very different cortex.