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Specimen ID: B320 KD-AS-MT-8
A macroscopic, branched green filament that is not coenocytic, with hooked branches found south of Alaska.
Attached on rock.
Nearby species: red, green, brown algae; spread all across the beach
Tidal zone: low/mid intertidal
Very abundant
Reproductive: No

specimen B320-TBS-1

Identifying features: Flattened, highly branched blades, with further branching also seen on the lateral branches; conspicuous midrib; fringed with pigmented hairs; and a narrow main axis
Growing on: Was found detached from substrate
Intertidal zone: Low intertidal
Time collected: March 30 2024, 3:46PM
Commonality: Rare
Nearby species: None, was found in the water near the shore
Life cycle Stage: Sporophyte

B320-EH-JL-RA-WJ-11
Drift in water
Low intertidal
Collected at 3:53 PM
Rare
Nearby species: Ulva, Acrosiphonia, Saccharina latissima
Not reproductive
Features to help identify: Plant terete with narrowing at base of each branch, found subtidal

Field ID: BIOL320 AC-RZ-AL-JY 3
Physical Description: Dark red. Branching is alternate and distichous.
Collection Date/Time: 4:12 PM (PST) - March 30, 2024
Location & attachment: Low intertidal. Drifting.
Surrounding Species: Ulva sp., Pyropia, sp., Chondracanthus exasperatus.

Specimen field ID #: B320-JC-XY-SK-5
Growing on boulder
Low to mid intertidal zone
Time collected: 3:50pm
Some others
Nearby: Acrosiphonia, Ulva fenestrata
Cystocarps on female gametophyte
Identifying features: Whorled branching, gland cells terminal

Habitat: Low intertidal, growing on rock
Abundance: Very Common
Nearby species: Pyropia sp., Acrosiphonia sp., Ulva fenestrata
Life history: unknown

Description:
Small, long, bright green blades growing in clusters. The thin blades are tubular at base and have ruffled edges.

Brown seaweed with a branching blade wider than 1cm with visible midrib.
Collected 2024/03/30 4:11 PM
Found in the low intertidal, drift
surrounding species: Acrosiphonia, Ulva, Pyropia. Single drift individual, probably washed up from lower height

Red alga (Phylum Rhodophyta, Class Florideophyceae), specimen B320-TBS-8
Identifying features: Red blade with noticeable criss-crossing veins. Veins join together as well as branch.
Growing on: Found washed up in the sand. Unsure what it was growing on.
Intertidal zone: Mid-high intertidal
Time collected: March 30 2024, 3:08PM
Commonality: Rare. We only found 1 specimen
Nearby species: None
Reproduction: Reproductive. Had tetrasporangia.

Collected at 3:50PM, this species was located at the waterline at the mid intertidal zone loosely situated on top of a rock. Ulva and other abundance of green algae were found nearby. There are whorled branching patterns with each whorl consisting of three to four (sometimes two) determinate branches of unequal length. Gland cells are also found at the terminal of the cells of the determinate branches. It was the only Hollenbergia subulata present in this area, appearing to be scarce. Reproductive structures, tetraspores, are found on the branches of this species.

Specimen field ID #: B320 AL-MK-TL-WD 6
Growing on: Drift
Tidal zone: Low intertidal
Time collected: 3:37
How common?: Not common
Nearby species?: Other brown alga
Specimen reproductive?: No
Which features help identify this to genus and/or species?: Opposite branching, doesn't lie flat, cylindrical

Specimen field ID #: BIOL 320 JF-LQ-KZ
Growing on: Rock
Tidal zone: Middle intertidal zone
Time collected: 16:41
How common: Only one found in the area
Nearby Species: Ulva, Acrosiphonia and Cryptosiphonia
Specimen Reproductive?: No evidence
What features help identify this to genus and or specimen?: Translucent gland cells are subterminal on whorl branches, three to four determinate branches

B320-EH-JL-RA-WJ 8

Found as drift in water at low tide (3:41pm).

Not common. Wildemania amplissima and Saccharina latissima growing nearby.

No signs of reproduction.

Branching generally opposite, lower axes cylindrical.

B320-EH-JL-RA-WJ 15

Found in water at low tide (4:15).

Not common.

Saccarina latissima found nearby.

No evidence of reproduction.

Branching opposite, several orders of narrow lingulate branches.

Specimen field ID #: B320-JC-AS-GL-VP-6
Growing on: Drift, found at shore line
Tidal zone: Mid-intertidal, found at water-line adrift
Time collected: March 30, 4:22 pm
How common: Uncommon
Nearby species: Ulva spp. (common), Petalonia spp. (common), Pyropia spp. (common),
Reproductive structures: Cystocarps present
Features used to identify: Cystocarps present ornamented with a spine and are evenly distributed throughout the blade, leathery texture, one or two cystocarps per papilla (primarily one)

Field ID: B320JF-LQ-KZ-8
Growing on: A boulder
Tidal zone: Mid to lower intertidal
Time collected: March 30th at 3:35pm from Stanley Park, B.C.
Abundance: Very abundant
Nearby species: Fucus distichus, oysters, barnacles, Pyropia, Ulva
Specimen reproductive: no evidence of reproduction
Distinguishing characteristics: Dense, tufted plant (photos 4 and 5). Branchlets are not curved or hooked (photos 1, 2, 3). Final photo is a dried specimen.

Field ID: B320-JF-LQ-KZ-2
Growing on: Firmly attached to boulder
Tidal zone: Mid intertidal zone
Time collected: 5:36pm on Sunday, March 31st from Stanley Park, B.C.
How common: Common, quite a few patches found
Nearby species: Ulva, acrosiphonia, pyropia, barnacles
Specimen reproductive: no evidence of reproduction
Distinguishing features: Plant erect. Plant pyramidal in shape (photos 1 and 2), branch lengths decrease uniformly from base to apex. Final photo is a dried specimen.