Historic, archived document

Do not assume content reflects current scientific Knowledge, policies, or practices.

CONTRIBUTIONS TOWARD A

FLORA OF NEVADA. NOe Te

HYFERICACEAB OF NEVADA

by ROGERS McVAUGH

November 1, 190.

Issued by

The Division of Plant Exploration and Introduction, Buregu of Plant Industry, U. S. Department of igriculture, Washington, D. Ce

Work Projects Administration of Nevada, = Projects, O. Pe 65-2-O4-13, W. P. 658; Oe Pe 165-2-Ohe21, W. Pe 752.

Collaborator

Univorsity of Nevada.

Address all queries concorning this publication to the Division of Plant Exploration and Introduction, Bureau of Flnant Industry, U.S. Department of Agriculture, Washington, D. C.

CONTRIBUTIONS TOWARD A

FLORA OF NEVADA. NOe 7e

HYF&RICACEAE OF NEVADA

by ROGERS McVAUGH

November 1, 190.

Issucd by

The Division of Plant Exploration and Introduction, Bureau of Plant Industry, U. S. Department of Agriculture, Washington, D. Ce.

Work Projects Administration of Nevada, Projects, 0. P. 65--2-0h-13, W. P. 658; Oe Pe 165-2-Ohe21, We Pe 7526

Collaborator

University of Nevadae

Address all queries concerning this publication to the Division of Plant Exploration and Introduction, Bureau of Plant Industry,

| U. S. Department of Agriculture, ‘iashington, D. C.

i RUS +

ay

eon

i

MT SU AC Ny

HYPERICACHAR OF NEVADA

By Rogers McVaugh

Annual or perennial herbs with simple, opposite, entire leaves; leaves, and often calyx= and corolla-lobes, glandular- punctate with black or translucent dots, Corolla yellow; petals distinct; stamens usually numerous; styles (in ours) 33 fruit a

capsule; seeds manye

HYFSRICUM Le St. John!swort

Characters of the family.

KnY TO SPECIES le Styles about 1.0 mm, long; petals scarcely exceeding the sepals; plants annual, decumbent, forming mats. le He anagalloides. le Styles about 5 mm. long or mores petals much exceeding the

sepals; plants perennial, orect ----= = ce Hy Scouleri.

le HYPERICUM ANAGALLOIDES Cham, & Schliccht. Linnnea 3: 127. 1828, Leaf-blades elliptic to suborbicular, obtuse, usually less than 10 mm, long. Glands inconspicous, not black. Cymes l-

to heflowered, the petals salmon=colored, 3-5 mm. long.

Moist places, northern Idaho and southern British Colum= bia, south to northeastern Nevada and in the mountains to southern California (Lower California?).

Nevada: Washoe, Ormsby, Elko and Humboldt Counties. HYPERICUM SCOULERI Hook. Fle Bore Ame 1: 111. 1830.

H. formosum var. Scouleri Coult. Bot. Gaz. ll: 108. 1886,

Stems with tufts of small leaves in the axils, but with- out conspicuous sterile axillary branches. Leaf-blades ovate to oblong, obtuse, 1=4% cme long, black-dotted at least along the margins; flowers few to 40; cymes in an elongated inflo- rescence up to about 5 cm. thick and 15 em. long, or the in= florcscence more or less flat-topped but not dense and com- pact. Sepals 2.0-3.5 (rerely 5.0) mm. long, ovate, usually obtuse, about twice as long as broad.

Moist places, open wooded slopes and meadows, British Columbia and Montana, south to western Colorado, northern and western Nevada and southern California.

Nevada: Washoe, Ormsby, Elko, Humboldt, Nyc, Lander and

White Pine Countics.e

Excluded Species: 1) Hyrericum perforatum L., the Zurope- an St. John's-wort, is extensively naturalized in some parts of the Pacific States, The writer has seen no’ specimens from Neveadae The species may be distinguished from H. Scouleri by its dense, many-flowered, flat-topped inflorescence, by its

narrowly linear or lanceolate sharp-pointed scpals, which are

ae Hit

\

ty did

ae,

about times as long ‘as broad, and by the many slender ascending sterile leafy branches which are produced from the leaf-axilse

2) Hypericum concinnum Benth., the Gold-wire, has not been reported from Nevada, but occurs in the footehills of the Sicrra Novada in adjacent California. It may be distinguished from Hs Scouleri by its prominently acuminate sepals, which sro usually 6-10 mm, long and by its linear to lanceolate leaves which are usually strongly folded

along the midrib.

Mt, ed 4 Me