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Download as PDF; Printable version; ... is a cylindrical to oval mass of spikelets up to 6 centimeters long and 1.2 wide. ... USDA Plants Profile; Grass Manual Treatment;
The U.S. Department of Agriculture's Pomological Watercolor Collection is an archive of some 7,500 watercolor botanical illustrations created for the USDA between the years 1886 and 1942 by around five dozen artists. [1]
Since the establishment of the Office of Seed and Plant Introduction there has been an office within the USDA with this responsibility, though its name changes periodically. [2] Today, the branch of the USDA responsible for collecting and introducing new plant species is called the National Germplasm Resources Laboratory. [2] [7]
Gardening books encompass a variety of subjects from garden design, vegetable gardens, perennial gardens, to shade gardens. Every plant genus or category of plants may also be covered including roses, clematis, bulbs, hellebores, and hydrangeas. The Internet has expanded and enhanced the availability of gardening resources.
Gambelia speciosa, previously classified as Galvezia speciosa, [1] [2] [3] is commonly known as showy island snapdragon or showy greenbright.. It is a perennial plant, which is endemic to California chaparral and woodlands habitats on the Channel Islands in Southern California, and on Guadalupe Island west of the Baja California Peninsula in Baja California, Mexico.
It was intentionally planted on both the east and west coasts [2] to control weeds and prevent erosion. [1] Today it is a common grass across the continent and is a noxious weed in some areas. [ 3 ] It is a sturdy, hardy, persistent, aggressive grass that easily outcompetes many other plants and becomes the dominant species in disturbed habitat ...
Sidalcea hartwegii is an annual herb that produces a slender stem up to 30 centimetres (12 in) tall, mostly hairless with occasional branching hairs. The leaf blades are deeply divided into five to seven narrow linear lobes. The inflorescence is a clustered panicle of four to six flowers, each with five purplish pink petals about 2 centimeters ...
The green leaves have blades up to 12 centimeters wide which are divided into toothed or deeply lobed leaflets. The blade is borne on a long petiole. The inflorescence is a compound umbel of many tiny white flowers at the tip of a stemlike peduncle. The club-shaped fruit is ribbed and bristly, measuring 1 to 2 centimeters long.