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Leaf spots can vary in size, shape, and color depending on the age and type of the cause or pathogen. Plants, shrubs and trees are weakened by the spots on the leaves as they reduce available foliar space for photosynthesis. Other forms of leaf spot diseases include leaf rust, downy mildew and blights. [4]
This plant was first collected in 1900, but it was not described until 1982 to science as a species. [2] It is often treated as a variety of Lupinus westianus. [3] The scrub lupine is a biennial or perennial herb growing up to a meter tall. The leaves are oval with pointed tips, not palmate as in most other lupines.
Lupinus polyphyllus, the large-leaved lupine, big-leaved lupine, many-leaved lupine, [2] blue-pod lupine, [3] or, primarily in cultivation, garden lupin, is a species of lupine (lupin) native to western North America from southern Alaska and British Columbia [4] and western Wyoming, and south to Utah and California.
Lupinus lepidus is a small hairy perennial that reaches 10 to 61 centimetres (4 to 24 inches). [3] Palmately compound leaves extend up the stem, but most are basal. [3] The inflorescence is a dense spike-like raceme, with pink, purple, or blue flowers that often have a yellowish spot. [3]
Underside of leaf. The basal leaves are much more numerous with the 7–30 centimeter long leaf stems [3] spreading in every direction to from a rounded tuft of leaves. [2] Each leaf is made up of 8–13 small leaflets, [3] each leaflet is 4–8 centimeters long and rarely less than 10 millimeters wide. [4]
Lupinus argenteus plant, with silvery leaves. Lupinus argenteus is a species of lupine known by the common name silvery lupine. [2] It is native to much of western North America from the southwestern Canadian provinces to the southwestern and midwestern United States, where it grows in several types of habitats, including sagebrush, grassland, and forests.
Lupinus excubitus is a small shrub with gray-green foliage. The fan-shaped leaves are borne on the stem and may be clustered at the base. Generally covered with silvery hairs, each is made up of 7 to 10 narrow 5–50 millimetres (0.2–2.0 in) leaflets. The raceme inflorescence is a tall stalk of rich purple flowers, each with a bright yellow spot.
A raspberry leaf spot infection initially causes dark green circular spots on the upper side of young leaves, which will eventually turn tan or gray. [3] These spots are typically 1–2 millimetres (0.039–0.079 in) in diameter, but can get as big as 4–6 millimetres (0.16–0.24 in). [4] These spots can also fall out, causing a shot effect.