64 LAMINARIACEAE 
PLATE 20. Macrocystis integrifolia 
A photograph, showing basal bladderless sporophyls and a single rhizome from 
which four erect shoots arise (Coker 09600), natural size. The stipe that is somewhat 
in the foreground comes from a branch of the main rhizome. 
PLATE 21. Macrocystis integrifolia 
_ A photograph, showing two compound sporophyls and the arrangement of the 
sori. The lower of the two compound blades lacks a vesicle, while the higher one 
(on the same plant) is provided with a well-developed vesicle. About four fifths of the 
natural dimensions. Photograph from a fluid-preserved specimen (Coker 09600). 
PLATE 22. Macrocystis integrifolia 
. с іа 
Photograph of a sp ing (Coker 09166—from liquid preservative), 
showing much elongated vesicles, narrow entire ог subentire blades, basal compound 
sporophyls, etc.; a little more than one third of the natural dimensions 
MACROCYSTIS PYRIFERA HUMBOLDTII (Bonpl.) Hook. 
f. & Harv. in Hook. f. Fl. Anarct. за 
г 401. 1846 
Fucus Humboldtii Bonpl. іп Humb. & Bonpl. РІ. Aequin. 2: 7. pl. 
. 1808. 
Fucus hirtus Humb. & Bonpl. loc. cit. 9. pl. бо. 
Laminaria pomifera Lamour. Essai 22. 1813: 
Macrocystis Humboldtii Kunth, Syn. РІ. Aequin. т: 6. 1822. 
Macrocystis Humboldti Ag. Syst. Alg. 293. 1824. 
“Dredged іп 2% fathoms,” “the common large weed of the 
Bay, being taken regularly in scallop dredges,” Island of San 
Lorenzo, region of Callao, Feb. 5, 1907, Coker 6o (PLATE 23); Bahía 
de la Independencia, July 19, 1907, Coker 09613, 09632, 09633, 
09635 (PLATE 24)—“attached to rocks or to large mussels at the 
bottom; the largest piece measured 10 meters and the entire 
single.cluster weighed 30 lbs." 
The type of Fucus Humboldtii came from the Peruvian coast 
and Dr. Coker’s specimens agree closely with the original illustra- 
tion except that the plants are larger and the blades often broader. 
Two of the specimens show the holdfasts, which form compact 
masses of nterlaced hapteres 3-5 cm. in diameter, cup-shaped | 
below from having overgrown shells (PLATE 23). In these two . 
numbers with holdfasts (60 and 09633), sori are found on modified, 
bladderless, usually compound, basal blades in about the same 
fashion as figured by Saunders* and by Нойтап? for Macrocystis 
# Proc, Washington Acad. Sci. 3: 27. бо. тоот. occ 
t Univ. California Publ. Bot. 4: pl. 20. I9II. 
аа RAM 
