Plant Lab #1: College Campus PDF

ENVR 162 Fall 2024 Plant Lab #1: College Campus Trees1 1. Pinus monticola (western white pine) (Family2: Pinaceae; pine) Page 38; thin, grey, smooth bark. Needles in bundles of 5....

ENVR 162 Fall 2024 Plant Lab #1: College Campus Trees1 1. Pinus monticola (western white pine) (Family2: Pinaceae; pine) Page 38; thin, grey, smooth bark. Needles in bundles of 5. Very large cones often hanging from high branches; branches in whorls 2. Populus tremuloides (trembling aspen) (Family: Salicaceae; willows) Page 29; smooth bark without large lenticels. Bark colour ranges from greenish-grey to white. Leaves are nearly circular with a pointed tip. Petioles are long and flattened allowing the leaves to “tremble”; reproduces mainly from root suckers, cloning itself and growing groves. 3. Populus trichocarpa (black cottonwood) (Family: Salicaceae; willows) Page 28; large deciduous tree common in wet areas and riparian zones. Smooth, grey bark on straight trunks that becomes deeply furrowed as the tree ages. Leaves triangular with pointed tips. In spring, the large reddish buds are sticky and quite fragrant. (Formerly P. balsamifera) 4. Pseudotsuga menziesii (Douglas-fir) (Family: Pinaceae; pine) Page 4; red pointed buds; thick, very corky bark; “mouse-like bract on cone.” Firs are “friendly”, soft to the touch not like spruce Shrubs 5. Corylus cornuta (beaked hazelnut) (Family: Betulaceae; birch) Page 79; similar leaves to birch and alder, but more oval and pubescent (soft hair), large yellow/green buds, leaves have doubly saw-toothed edges 6. Crataegus douglasii (black hawthorn) (Family: Rosaceae; rose) Page 57; forms large shrub to small tree. Stout straight thorns (1-3 cm). Leaves are thick and leathery, paler below, with 5-9 small lobes at top. Fruit is a blackish-purple pome (apple, like similar to a saskatoon berry). 7. Holodiscus discolor (ocean spray or ironwood) (Family: Rosaceae; rose) Page 62; clusters of small cream-coloured flowers that turn brown and persist for a year or more. Leaves are broadly triangular, lobed 1 Numbers refer to the page number in Plants of Southern Interior British Columbia (Parish, Coupe, and Lloyd. 1996) 2 Family information does not need to be memorized but it will be part of an open book Moodle quiz. 1  8. Prunus virginiana (choke cherry) (Family: Rosaceae; rose) Page 58; deciduous shrub with oval leaves, tapering at both ends. Leaf margins have fine, sharply toothed edges. Petioles with paired glands just before leaf. Red to purple or black cherries in clusters, edible but astringent. 9. Rubus parviflorus (thimbleberry) (Family: Rosaceae; rose) Page 62; large, soft, fuzzy maple-leaf shaped leaves, broad raspberry-like fruit. Alternate leaves. Often growing in thickets; spreads by rhizomes. 10. Symphoricarpos albus (common snowberry) (Family: Caprifoliaceae; honeysuckle) Page 82; Prominent opposite branching and leaves. Elliptic to oval leaves with smooth edge (sometimes irregularly lobed on young stems). Spongy white, berry-like fruit that persist into winter. Considered to be poisonous. 11. Toxicodendron rydbergii (poison ivy) (Family: Anacardiaceae; cashew/sumac) Page 70; DO NOT TOUCH!! May cause skin irritation. Leaflets of three, sharply pointed, turning red in fall Herbs 12. Apocynum androsaemifolium (spreading dogbane) (Family: Apocynaeae; dogbane) Page 190; branched stems with milky sap, opposite, drooping leaves. Pink flowers, fruits are paired, cylindrical pods. 13. Prosartes hookeri (Hooker’s fairybells) (Family: Liliaceae; lilies) Page 201; has a double flower stalk just at the end of the stems and orange berries. Hooked hairs on leaf blade. 14. Pteridium aquilinum (bracken fern) (Family: Dennstaedtiaceae; bracken) Page 362; stalks are stout and woody-like and arise from ground as single stems. Each frond forms an equilateral triangle, with rolled under edges. Moss 15. Polytrichum juniperinum (juniper haircap moss) (Family: Polytrichaceae; haircap) Page 399; tiny needle-like leaves, looks like a small seedling. Sporophyte has a hairy white covering on the spore-producing capsule (often falls off in fall). 2