Date: 5/21/24
Season: Spring in the Mojave Desert
Location: Red Rock Canyon (Las Vegas, NV)
Desert flora in May: Buckhorn Cholla Cactus, Prickly Pear Cactus, Virgin River Brittlebrush, Mojave Yucca, Palmer’s Penstemon
Buckhorn Cholla Cactus
Cylindropuntia acanthocarpa
Cholla is native to the Mojave, Sonoran, and Colorado Deserts of North America.
-
The buckhorn cholla is an open and spreading woody cactus, up to 1 m tall. The gray-green stems, also called "joints", are cylindrical, 5-30 cm long and 17-20 mm in diameter with tubercles or nodules. Each tubercle has a cluster of stiff spines, which are covered with loose papery sheaths. The flowers are up to 5 cm long and range from yellow to purple-red with shades in between. The fruits are obovoid, dry, shriveled and spiny and drop off later in the season. The seeds are light yellowish to gray-brown, 3.5 to 4 mm. long.
(https://plants.usda.gov)
-
Kingdom: Plants
Phylum: Vascular
Class: Dicots
Order: Pinks, Cactuses, And Allies (Caryophyllales)
Family: Cacti (Cactaceae)
Genus: Cylindropuntia
Species: Cylindropuntia acanthocarpa Common Name: Buckhorn Cholla
Prickly Pear Cactus
Opuntia woodsii
Located along path to the Red Rock Canyon Visitor Center.
-
O. woodsii is a medium-sized Opuntia, seldom reaching more than 50 cm in height. Nevertheless, it is not a small plant. It is typically a stiffly spreading or ascending bushy plant. However, it does grow low and spreads along the ground in cold winter climates. Cladodes may be round but are more often oval or obovate, narrowing toward the base. Areoles in the upper half of the cladodes have (1)2-4 whitish spines that may stand out from the surface. The white spines sometimes have brown bases extending halfway up the spine.
Flowers are salmon, pink, or even bright orange-red.
(https://www.opuntiads.com)
-
Kingdom: Plants
Phylum: Vascular
Class: Dicots
Order: Pinks, Cactuses, And Allies (Caryophyllales)
Family: Cacti (Cactaceae)
Genus: Opuntia
Species: Opuntia woodsii
Common Name: Prickly Pear
Virgin River Brittlebush
Encelia virginensis
Located on the slopes of Calico Hills.
-
Virgin River brittlebush is a native evergreen shrub up to three feet high and three feet wide with many slender branching stems growing from the base. Younger stems are hairy, while older stems may have fissured bark.
Leaves are oval, simple, 0.5 to 1 inch long, with a smooth margin. Short, soft hairs give the leaves a grayish green appearance. Leaf arrangement is alternate and opposite.
Flowers heads are borne singly on hairy stems and have yellow ray flowers less than 0.5 inches long, and yellow to orange disk flowers. The blooming period is typically March through June.
The fruit is a dark brown to black achene, 0.2 to 0.3 inches long. Virgin River brittlebush is distinguished from other Encelia species by its smaller mature plant size, smaller leaves, and the presence of both ray and disk flowers.
(https://plants.usda.gov)
-
Kingdom: Plants (Plantae)
Phylum: Vascular (Tracheophyta)
Class: Dicots (Magnoliopsida)
Order: Sunflowers, Bellflowers, Fanflowers, Allies (Asterales)
Family: Sunflowers, Daisies, Asters, Allies (Asteraceae)
Genus: Brittlebrushes (Encelia)
Species: Encelia virginensis
Common Name: Virgin River Brittlebush
Mojave Yucca
Yucca schidigera
-
Mojave Yucca is a species in the Agaveceae (Agave) family that is native to southern California. It grows in coastal sage scrub near the coast, in mountain chaparral, and in desert transition areas at elevations from sea level to 8,200 feet. Like others in this family it is a monocot, so the leaves have parallel veins. The leaves emerge from a central rosette, are succulent and quite stiff, with sharp terminal spines and long, tough fibers. Some of these fibers are typically visible along the edge of the leaves. Native people processed the leaves and used the fibers for cordage. In spring the plant produces a flower stalk 12-18 inches in height covered with white or cream colored flowers. The flower is pollinated by only a single species of Yucca Moth, and many of the flowers go unpollinated. The fruit is a large capsule holding dozens of black, wedge-shaped seeds. It reproduces only by seed, not by offsets as other Agaves do. Unlike most other members of this family, Mohave Yucca does not die after blooming, a trait it shares with Joshua Tree (Yucca Brevifolia). For this reason, it tends to grow taller with age, starting at ground level as a young plant and eventually reaching 10ft. or more. Older plants are usually branched and each branch carrying a leaf rosette. Areas that support older specimens have not been disturbed or burned for many years.
(https://calscape.org)
-
Kingdom: Plants (Plantae)
Phylum: Vascular
Class: Monocots
Order: Asparagales
Family: Asparagaceae
Subfamily: Agavoideae
Genus: Yucca; L.
Species: Yucca schidigera
Common Name: Mojave Yucca
Palmer’s Penstemon
Penstemon palmeri
-
Penstemon palmeri, known by the common name Palmer's penstemon, is a species of perennial flowering plant in the genus Penstemon that is notable for its showy, rounded flowers, and for being one of the few scented penstemons. The plant, in the family Plantaginaceae, is named after the botanist Edward Palmer.
(Wikipedia)
-
Kingdom: Plants (Plantae)
Phylum: Vascular (Tracheophyta)
Class: Dicots (Magnoliospida)
Order: Mints, Plantains, Olives, and Allies (Lamiales)
Family: Plantaginaceae (Plantain)
Genus: Beardtongues (Penstemon)
Species: Penstemon palmeri
Common Name: Palmer’s Penstemon