1922] Gardner: The Genus Fuciis on the Pacific Coast 39 



Fucus evanescens f . cuneatus f . nov. 



Plate 38 



Frondes parvae, 5-10 cm. altae, membranaceae. regulariter dicho- 

 tomae, olivaceo-brunneae, segmentis inferioribiis distincte cuneatis, 

 segmentis terminalibus fere linearibiis, 4-8 mm. latis, apieibus trim- 

 catis, costa inconspieua, superne paulnlum evanida. cryptostomatibus 

 paucis, inconspicuis ; receptaciilis complanatis vel interdum inflatis, 

 alte bifidis. plerumque aeiiminatis. ob plantae magnitudinera compara- 

 tive amplis ; conceptaciilis comparative amplis numerosisque. 



Growing on sandstone in the upper littoral region. Near Empire, 

 Coos Bay, Oregon. 



Type, Gardner, no. 2785 (Herb. Univ. Calif., no. 201196), May, 

 1914. 



One becomes somewhat exasperated in attempting to deal with such 

 forms as the one above. Ordinarily it might be considered a depau- 

 perate form of some other well developed and characteristic form. 

 There w^ere several square rods of fruiting plants like those represented 

 on plate 38 growing on very gently sloping sandstone near high-tide 

 level. There were no other plants growing near, and there was seem- 

 ingly no reason why, from the standpoint of anchorage, they should 

 not grow much farther down in the littoral belt. The reduced size 

 could not be due to superabundance of fresh water, for several much 

 larger forms were found growing from three to six miles farther up 

 the bay where the water is much less saline. ]\Iany plants have w^ell- 

 developed mature receptacles. 



Its general characters seem to favor its being grouped with F. 

 evanescens, although it will fit practically as well into the edentatus 

 group. I am placing it with the former until more can be learned of 

 its life history. 



Fucus evanescens f. ecostatus f. nov. 

 Plate 39 



Frondes submembranaceae, 12-18 cm. altae, dichotomae vel sub- 

 secundae, luteolae, siccatae obscure brunneae, stipite et disco radical! 

 f ragilissimis ; segmentis strictis. cuneatis, 5-12 mm. latis. puncto cres- 

 cente inconspicuo, costa indistincta, fere ad lobos terminales evanida, 

 alis tenuibus membranaceisque, cryptostomatibus paucis et incon- 

 spicuis; receptaculis variabilibus, inflatis vel complanatis. saepissime 

 angustis, bifidis, acuminatis; conceptaculis inconspicuis. 



Growing on sandstone, wooden floats, etc.. in the upper littoral belt. 

 Coos Bay, Oregon. 



