Adenophyllum porophylloides
Encyclopedia
Adenophyllum porophylloides is a species of flowering plant in the daisy family
known by the common names San Felipe dogweed and San Felipe dyssodia. It is native to the Sonoran
and Mojave Desert
s of the southwestern United States and northern Mexico. This is an aromatic desert subshrub with several branching stems reaching a maximum height near 60 centimeters. The sparse, clawlike leaves are divided into sharply pointed linear lobes that bear prominent resin glands. The foliage has an unpleasant scent. The inflorescence
is borne on a peduncle
several centimeters long. The flower head
is cylindrical and lined with phyllaries
with large resin glands on them. The tip of the head blooms with bright yellow to reddish orange disc florets. There are sometimes short, stubby yellow to reddish ray florets along the rim. The fruit is an achene
about 5 millimeters long with a bristly, scaly pappus
.
Asteraceae
The Asteraceae or Compositae , is an exceedingly large and widespread family of vascular plants. The group has more than 22,750 currently accepted species, spread across 1620 genera and 12 subfamilies...
known by the common names San Felipe dogweed and San Felipe dyssodia. It is native to the Sonoran
Sonoran Desert
The Sonoran Desert is a North American desert which straddles part of the United States-Mexico border and covers large parts of the U.S. states of Arizona and California and the northwest Mexican states of Sonora, Baja California, and Baja California Sur. It is one of the largest and hottest...
and Mojave Desert
Mojave Desert
The Mojave Desert occupies a significant portion of southeastern California and smaller parts of central California, southern Nevada, southwestern Utah and northwestern Arizona, in the United States...
s of the southwestern United States and northern Mexico. This is an aromatic desert subshrub with several branching stems reaching a maximum height near 60 centimeters. The sparse, clawlike leaves are divided into sharply pointed linear lobes that bear prominent resin glands. The foliage has an unpleasant scent. The inflorescence
Inflorescence
An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Strictly, it is the part of the shoot of seed plants where flowers are formed and which is accordingly modified...
is borne on a peduncle
Peduncle (botany)
In botany, a peduncle is a stem supporting an inflorescence, or after fecundation, an infructescence.The peduncle is a stem, usually green and without leaves, though sometimes colored or supporting small leaves...
several centimeters long. The flower head
Head (botany)
The capitulum is considered the most derived form of inflorescence. Flower heads found outside Asteraceae show lesser degrees of specialization....
is cylindrical and lined with phyllaries
Bract
In botany, a bract is a modified or specialized leaf, especially one associated with a reproductive structure such as a flower, inflorescence axis, or cone scale. Bracts are often different from foliage leaves. They may be smaller, larger, or of a different color, shape, or texture...
with large resin glands on them. The tip of the head blooms with bright yellow to reddish orange disc florets. There are sometimes short, stubby yellow to reddish ray florets along the rim. The fruit is an achene
Achene
An achene is a type of simple dry fruit produced by many species of flowering plants. Achenes are monocarpellate and indehiscent...
about 5 millimeters long with a bristly, scaly pappus
Pappus (flower structure)
The pappus is the modified calyx, the part of an individual disk, ray or ligule floret surrounding the base of the corolla, in flower heads of the plant family Asteraceae. The pappus may be composed of bristles , awns, scales, or may be absent. In some species, the pappus is too small to see...
.