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On woodwork under old tide mill, Harpswell, Maine.

On moist ground in conservatory, Golden Gate Park, San Francisco, California.

Forming a black, very thin film om muddy beams under old tide-mill. Harpswell, Maine

On Shells, Mountain Lake, San Francisco, California.

On the sides of a water trough, Berkeley, California.

In an aquarium, Golden Gate Park, California.

Floating among Chara in a small stream near Richmond, Contra Costa County, California.

Forming a thin layer on the moist shady side of a sandy cliff, Bolinas, Marin County, California.

Lake Chabot, San Leandro, Alameda County, California.

In a ditch at Ravenna Park, Seattle, Washington.

On rocks, under drip of fresh water, Newport, Rhode Island.

In a runway on rocks, from upper pools, Brownie Island, Jonesport, Maine.

In a shallow ditch, Oakland, California.

Marblehead Neck, Mass. Similar locality as 1060a [In a runway on rocks, from upper pool. (...) with Calothrix scopulorum etc.]

In a high pool, exposed to spray only, Ragged Island, Casco Bay, Maine.

Very delicate form, growing on floating Zostera marina, Newport Harbor, Rhode Island.

On Porphyra lacinata, Inner Mark Island, Casco Bay, Maine.

On rocks, lower litoral zone, Marblehead Neck, Massachusetts.

Gibbs' Pond, Nantucket, Massachusetts.

On logs, sticks and stones in Fly Creek, a clear spring-fed creek that empties into Mobile Bay, Alabama.

Floating in abundance in Stone Lake, Golden Gate Park, San Francisco, California.

On dripping rock, Lake Chabot, San Leandro, California.

On springly ground, Mountain Lake, San Francisco, California.

Mountain Lake, San Francosco, California.

In a water trough, Stanford stock farm, Palo Alto, California.

Floating in a pond, Mountain View Cemetery, Oakland, California.

In a tub of water, campus of the University of California, Berkeley, California.

Mountain View Cemetery, Oakland, California.

Forming gelatinous masses on logs floating in salt water, Alameda, California.

Mixed with Anabaena sp., floating in Green Lake, Seattle, Washington.

On trunk of Bay tree, Strawberry Creek, Berkeley, California.

Pool by roadside, No. Berkeley, California.

On rocks in stream, No. Berkeley, California.

In a small stream near Berkeley, California.

In Stone Lake, Golden Gate Park, San Francisco, California.

In a small spring near San Pablo, California.

On sandy ground, Lake Merced, San Francisco, California.

On Balani and rocks, Magnolia Point, Massachusetts.

Forming a thick layer on plants just below water mark, Alameda, California.

On Enteromorpha, Magnolia, Massachusetts.

In a gelatinous mass on wet cliff, Wanalancet Falls, Tamworth, New Hampshire.

On rocks, litoral, Porto Rico.

On moist ground, Mountain Lake, San Francisco, California.

In a pool by the side of a stream, Berkeley, California.

Floating in great quantities, Lake Zumbra, Minnesota.

On rocks, etc., litoral, Porto Rico.

Among other algae, on boards wet with salt water, Alameda, Califronia.

Floating, So. Harpswell, Maine.

On stipe of Laminaria longicruris, So. Harpswell, Maine.

On rocks near low water mark and in rock pools higher up, Bolinas, Marin Co., California.