Calochortus monophyllus (Lindl.) Lem.
Annotated by Callahan, F., 4 Jan 2014.

Oregon: Jackson County: [locality and coordinates withheld; status in Oregon: S1 (Critically Imperiled; OBIC)],

Frank Callahan CM-CP-2, Jun 2009
OSC, Catalog: OSC229396

Calochortus monophyllus (Lindl.) Lem.
Annotated by Callahan, F., 4 Jan 2014.

Oregon: Jackson County: [locality and coordinates withheld; status in Oregon: S1 (Critically Imperiled; OBIC)],

Frank Callahan CM-CP-1, May 2009
OSC, Catalog: OSC229416

Calochortus monophyllus (Lindl.) Lem.
Annotated by collector.

Oregon: Jackson County: [locality and coordinates withheld; status in Oregon: S1 (Critically Imperiled; OBIC)],
Yellow Star Tulip. Phenology: flowering.

James T. Duncan 032, Jun 18, 2000
SOC, Accession: 22505

Calochortus monophyllus (Lindl.) Lem.
Annotated by Callahan, F., 4 Jan 2014.

Oregon: Jackson County: [locality and coordinates withheld; status in Oregon: S1 (Critically Imperiled; OBIC)],
Plants on private lands, not common; this is the northernmost known range for this species.

Frank Callahan s.n., May 1995
OSC, Catalog: OSC217815

Calochortus monophyllus (Lindl.) Lem.
Annotated by collector. Remarks: with F. Callahan

Oregon: Jackson County: [locality and coordinates withheld; status in Oregon: S1 (Critically Imperiled; OBIC)],
Open rocky ridge, Platty, volcanic; with Abies concolor, Holodiscus discolor, Arctostaphylos patula, Allium siskiyouensis, Delphinium menziesii, Selaginella densa, Lomatium macrocarpum, Microsteris collinsia parviflora, Erigonium sp, Poa (1675) 50 plants (41) Phenology: flowering.

Frank A. Lang s.n., collected 1990
SOC, Accession: 07830

Calochortus monophyllus (Lindl.) Lem.
Annotated by Callahan, F., 4 Jan 2014.

Oregon: Jackson County: [locality and coordinates withheld; status in Oregon: S1 (Critically Imperiled; OBIC)],
Capsules collected in late July 1989; positive identification made in flower 1990 with Frank Lang and John Erwin.

Frank Callahan s.n., Jul 1989
OSC, Catalog: OSC217779