66 FUCACEAE 
Juanita Hoffman, who has recently reviewed the scanty literature 
relating to fructification of Macrocystis.* 
The plants that we are here referring to Macrocystis pyrifera 
Humboldtii have subterete or slightly compressed stipes, subglobose | 
or pyriform vesicles, and smooth or slightly wrinkled blades that 
are only 0.13-0.30 mm. thick; the cells of the inner cortex of the 
blade are large (40-90 и in cross section) and are rather thin-walled; 
muciferous canals are common in the stipe but seem to be rare or 
inconspicuous in the blades, which is the reverse of what obtains 
in M. integrifolia. 
This form of Macrocystis was collected in Peru (in 1839) by 
the Wilkes Expedition, according to specimens in the herbarium 
of Columbia College, and what is presumably this form has been 
reported from Callao under the name M. Humboldtii by Montagne 
© 1. Boliv. 35. 1839) and by Piccone (Аш. Vettor Pisani 38. 
86). 
PLATE 14, FIGURE B. Macrocystis pyrifera Humboldtii 
Photograph (from Dr. Coker) showing a specimen collected in the region of 
allao. . : 
PLATE 23. Macrocystis pyrifera Humboldtii 
Photograph of the basal part of a young йыны (Coker 60 p.p.—from liquid 
preservative) showing holdfast attached to shell, immature basal bladderless 
sporophyls, the flexible filiform marginal ae е etc. About one third of the natural 
dimensions. (The bullae on vesicles and blades are due to imperfect preservation.) 
PLATE 24. Macrocystis byrifera Humboldtii 
Photograph of a floating fragment (Coker 09635), showing sori on blades of the 
ordinary vegetative form, about one third of the natural dimensions. 
Family FUCACEAE 
SARGASSUM Аг. Sp. Alg. 1: r. 1820 
SARGASSUM PACIFICUM Bory, Voy. Coquille, Rot. Crypt. 123. 1828. 
Bay of Ferrol (Chimbote), onting, Feb. 28, 1907, Coker 110; 
in same locality, “on tide rocks,” Mar. 1, 1907, Coker 117; Lobos 
de Afuera, Dec. 5, 1907, Coker 270 (attached—PLATE 25). 
Plants 20-30 cm. long, densely or rather r loosely foliose; leaves 
* Univ. California Publ. Bot. 4: 151—158. pl. 20. 1911. отт. She overlooks, however 
the principal contribution to the subject, published by Skottsberg four years earlier 
Dr. Skottsberg's paper “Zur Kenntnis der subantarktischen und antarktischen | 
Meeresalgen. І. Phaeophyceen” includes the most complete and detailed топо- 
si Macrocystis yet written (Schwed. Sudpol.-Exp. 46: 80-139. pl. 9 +f. 91-17% 
1907 | 
