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Parietaria hespera
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Rillita Pellitory
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Parietaria hespera

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About Rillita Pellitory (Parietaria hespera) Parietaria hespera is a species of flowering plant in the nettle family known by the common name rillita pellitory. It is native to the southwestern United States and northwestern Mexico, where it grows in many types of habitat, from coast to desert, dry to moist, and sometimes in disturbed areas. It is an annual herb taking an erect or spreading form up to half a meter long or forming a mat or dense tangle. The stems may branch or not. They are lined with alternately arranged leaves up to 2 centimeters long and varying in shape from oval to round or somewhat kidney-shaped. The inflorescence is a cluster of flowers emerging from the leaf axils. The flower has no petals but greenish sepals which may be tinged yellowish or reddish brown. As of November 2013[update], The Plant List did not accept this species, regarding its status as unresolved.
Plant Description
Plant Type
Annual herb

Flower Color
Yellow, Red, Brown

Native Status

Natural Setting
Elevation ?
-15' - 8174'

Annual Precip. ?
3.0" - 39.9"

Summer Precip. ?
0.15" - 2.83"

Coldest Month ?
40.0° F - 61.0° F

Hottest Month ?
58.4° F - 88.8° F

Humidity ?
0.86 vpd - 41.22 vpd

Landscaping Information
Nursery Availability
Never or Almost Never Available

Sources include: Wikipedia. All text shown in the "About" section of these pages is available under the Creative Commons Attribution-ShareAlike License. Plant observation data provided by the participants of the California Consortia of Herbaria, Sunset information provided by Jepson Flora Project. Propogation from seed information provided by the Santa Barbara Botanical Garden from "Seed Propagation of Native California Plants" by Dara E. Emery. Sources of plant photos include CalPhotos, Wikimedia Commons, and independent plant photographers who have agreed to share their images with Calscape. Other general sources of information include Calflora, CNPS Manual of Vegetation Online, Jepson Flora Project, Las Pilitas, Theodore Payne, Tree of Life, The Xerces Society, and information provided by CNPS volunteer editors, with special thanks to Don Rideout. Climate data used in creation of plant range maps is from PRISM Climate Group, Oregon State University, using 30 year (1981-2010) annual "normals" at an 800 meter spatial resolution.

Links:   Jepson eFlora Taxon Page  CalPhotos  Wikipedia  Calflora

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