Pentachaeta exilis

Last updated

Pentachaeta exilis
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Pentachaeta
Species:
P. exilis
Binomial name
Pentachaeta exilis
Synonyms

Chaetopappa exilis

Pentachaeta exilis is a species of flowering plant in the family Asteraceae known by the common name meager pygmydaisy. It is endemic to California, where it is known from the North Coast Ranges to the southern Central Valley, San Joaquin Valley, and Sierra Nevada foothills. It is a member of grassland and woodland plant communities.

Description

Pentachaeta exilis is an annual herb with a hairy stem no more than about 6 centimeters tall. The narrow linear leaves are up to 3 centimeters long but only about a millimeter wide. The inflorescence is a solitary flower head, with up to 23 heads per plant. The two subspecies of the plant have different types of heads. Most individuals of the plant are of subspecies exilis, which has long reddish disc florets in its head but only rudimentary ray florets. The rare subspecies aeolica, which is known from just a few occurrences in the Central Coast Ranges, generally produces some white ray florets around a center of yellow disc florets.


Related Research Articles

<i>Hulsea vestita</i> Species of flowering plant

Hulsea vestita is a species of flowering plant in the family Asteraceae known by the common name pumice alpinegold.

<i>Lasthenia ferrisiae</i> Species of flowering plant

Lasthenia ferrisiae is a species of flowering plant in the family Asteraceae known by the common name Ferris' goldfields. It is endemic to the California Central Valley, where it grows in vernal pools and alkali flats.

<i>Lasthenia fremontii</i> Species of flowering plant

Lasthenia fremontii is a species of flowering plant in the family Asteraceae known by the common name Frémont's goldfields. It is endemic to the California Central Valley, where it grows in vernal pools and meadows.

Layia pentachaeta is a species of flowering plant in the family Asteraceae known by the common name Sierra tidytips, or Sierra layia.

Layia septentrionalis is an uncommon species of flowering plant in the family Asteraceae known by the common name Colusa tidytips, or Colusa layia.

<i>Blepharizonia plumosa</i> Species of flowering plant

Blepharizonia plumosa is a California species of tarweed known by the common name big tarweed. It is endemic to central California, where it grows in the Central Coast Ranges and adjacent sections of the southern San Francisco Bay Area and Central Valley, from southern Sonoma County south as far as San Luis Obispo County.

<i>Coreopsis douglasii</i> Species of flowering plant

Coreopsis douglasii is a species of flowering plant in the family Asteraceae known by the common name Douglas' tickseed. It is native to California from Santa Clara County to San Diego County, as well as from Mohave County in Arizona.

<i>Crepis modocensis</i> Species of flowering plant

Crepis modocensis is a species of flowering plant in the family Asteraceae known by the common name Modoc hawksbeard.

<i>Encelia actoni</i> Species of flowering plant

Encelia actoni, also known by the common names Acton brittlebush and Acton encelia, is a species of flowering plant in the family Asteraceae.

<i>Holocarpha heermannii</i> Species of flowering plant

Holocarpha heermannii is a species of flowering plant in the family Asteraceae known by the common name Heermann's tarweed. It is endemic to California.

<i>Holocarpha virgata</i> Species of flowering plant

Holocarpha virgata is a species of flowering plant in the family Asteraceae known by the common names yellowflower tarweed, pitgland tarweed, and narrow tarplant.

<i>Leptosiphon nuttallii</i> Species of flowering plant

Leptosiphon nuttallii is a species of flowering plant in the phlox family known by the common name Nuttall's linanthus.

<i>Oenothera californica</i> Species of flowering plant

Oenothera californica, known by the common name California evening primrose, is a species of flowering plant in the evening primrose family.

<i>Pentachaeta aurea</i> Species of flowering plant

Pentachaeta aurea is a species of flowering plant in the aster family known by the common names golden-rayed pentachaeta, golden chaetopappa, and golden leastdaisy. It is native to southern California, where it grows in the San Gabriel and San Bernardino Mountains and the Peninsular Ranges, and northern Baja California. It is an annual herb with a hairy stem reaching a maximum height near 36 centimeters from a slender taproot. The narrow linear leaves are up to 5 centimeters long but only a few millimeters wide and may be very hairy. The inflorescence is a solitary flower head, with up to 22 heads per plant. The flower head bears many yellow, brownish, or whitish ray florets 3 to 12 millimeters long, and has a center of many five-lobed yellow to reddish disc florets. The fruit is an achene tipped with a pappus of bristles.

Packera bernardina is a rare species of flowering plant in the aster family known by the common name San Bernardino ragwort.

<i>Senecio californicus</i> Species of flowering plant

Senecio californicus is a species of flowering plant in the aster family known by the common name California ragwort.

<i>Packera werneriifolia</i> Species of flowering plant

Packera werneriifolia, known by the common names alpine rock butterweed and hoary groundsel, is a species of flowering plant in the aster family. It is native to the western United States in the Sierra Nevada mountain habitat in subalpine and alpine climates, including forests and barren talus.

<i>Stenotus acaulis</i> Species of flowering plant

Stenotus acaulis is a species of flowering plant in the family Asteraceae known by the common name stemless mock goldenweed.

Deinandra increscens is a species of flowering plant in the family Asteraceae known by the common name grassland tarweed. It is endemic to California, where it has been found primarily in Monterey, San Luis Obispo and Santa Barbara Counties. A few isolated populations have been reported from Kern and Merced Counties, but these are from urban areas and probably represent cultivated specimens.

<i>Encelia ravenii</i> Species of flowering plant

Encelia ravenii is a multi−branched perennial shrub, reaching 1–3 feet (0.30–0.91 m) in height. The branches are lined with oval to roughly triangular leaves a few centimeters long, that are gray-green and woolly in texture.