Guide to Liverworts of Oregon: Asterella bolanderi (Aust.) Underw.
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Asterella 1a sex organs on lateral branches > Asterella bolanderi
Synonym: Asterella violacea (Aust.) Underw.
Special status: ORBIC List 3
Recognition: thallus rather narrow, mostly long and unbranched. the sexual organs are borne on short, lateral branches, both on the same plant. The spores are of medium size for an Asterella, with rather plain, coarse reticulate ridges. Alan Whittemore pointed out that internal cells are pitted (pers. comm.), as seen in the section of a Rogue River specimen, illustrated below. However, pitting was not observed in the Klamath County specimen. As that specimen was sparse and sterile, its ID needs to be verified by relocation.
Distribution: On mineral soil of trail cuts, cliff ledges or under rock overhangs; in Oregon known only from the lower Rogue River canyon, Curry County and Lake County (D. Stone 7930.4).
Comments: First found by Veva Stansell in 1986 along the Rogue River Trail opposite Stair Creek.
Rogue River, Curry County, Oregon. DHW m2983.
Young carpocephala. Wagontire Rock, Monterey Co., California. DHW m1231.
Wagontire Rock, Monterey Co., California. DHW m123.
Dorsal aspect thallus with ventral scale appendages. Wagontire Rock, Monterey Co., California. DHW m1230b.
Ventral aspect with ventral scales. Wagontire Rock, Monterey Co., California. DHW m1230b.
Ventral scales. Wagontire Rock, Monterey Co., California. DHW m1230b.
Ventral tissue with pitted cells. Rogue River, Curry County, Oregon. DHW m2983.
Mature carpocephala. Rogue River, Curry County, Oregon. DHW m2983.
Spores and elaters. Yucca Point, Tulare Co., California. DHW 3081.
Distal. Calif., Fresno Co., Sierra Nevada foothills, along Calif. Hwy 168. Doyle 2514 (UC).
Proximal. Calif., Fresno Co., Sierra Nevada foothills, along Calif. Hwy 168. Doyle 2514 (UC).
Side. Calif., Fresno Co., Sierra Nevada foothills, along Calif. Hwy 168. Doyle 2514 (UC).
Copyright 2006 Northwest Botanical Institute