Summary of Plants learned in this lab: Family Genus Species. ANACARDIACEAE Toxicodendron radicans. ASTERACEAE Ambrosia trifida
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1 Packet #8 St. Edwards Park September 22 nd Page 1 of 9 Summary of Plants learned in this lab: Family Genus Species ANACARDIACEAE Toxicodendron radicans ASTERACEAE Ambrosia trifida ASTERACEAE Gutierrezia amoena CACTACEAE Opuntia engelmannii CYPERACEAE Cyperus odoratus EUPHORBIACEAE Euphorbia marginata FABACEAE Desmodium paniculatum NYCTAGINACEAE Boerhavia diffusa OROBANCHACEAE AgalinIs heterophylla POACEAE Chloris cucullata SAPINDACEAE Cardiospermum halicacabum * SCROPHULARIACEAE Verbascum thapsus TYPHACEAE Typha latifolia * VERBENACEAE Verbena brasiliensis VERBENACEAE Verbena halei * not native to Texas
2 Packet #8 St. Edwards Park September 22 nd Page 2 of 9 CACTACEAE (Cactus Family) Opuntia engelmannii Prickly Pear, Cholla The red fruits are called tunas and can be fleshy and sweet. What vegetative plant part are the pads? the spines? This is the state plant of Texas. Opuntia sp. serve as host to Dactylopius coccus, the cochineal insect (the source of a red dye). Populations of Opuntia are kept in check by the Cactus moth Cactoblastis cactorum. NYCTAGINACEAE (Four-O Clock Family) Boerhavia diffusa This plant gets its specific epithet from its diffuse, spreading growth habit. Scarlet Spiderling What type of inflorescence does this plant have? What is the leaf arrangement? leaf complexity?
3 Packet #8 St. Edwards Park September 22 nd Page 3 of 9 POACEAE (Grass Family) Chloris cucullata Hooded Windmill Grass, Hooded Crowfoot Grass cucullata comes from Latin meaning hooded ; Why do you think it was named this? ASTERACEAE (Sunflower Family) Gutierrezia amoena What leaf shape does this plant have? Annual Broomweed leaf arrangement? What type of inflorescence? What are the two different flowers in this type of inflorescence called?
4 Packet #8 St. Edwards Park September 22 nd Page 4 of 9 OROBANCHACEAE (Broomrape Family) Agalinis heterophylla Prarie Agalinis heterophylla means various-leaved What is the floral symmetry? Wow many stamens do these flowers have? EUPHORBIACEAE (Spurge Family) Euphorbia marginata Snow-on-the-Mountain Look for the milky sap typical of this family (BE CAREFUL, sap can be irritating to the skin!!). What leaf arrangement? What leaf margin? Look for the cyathia (singular cyathium), small cup-like involucres each containing several staminate flowers and one pistillate flower with a 3- carpellated ovary. Where does this plant get its specific epithet?
5 Packet #8 St. Edwards Park September 22 nd Page 5 of 9 * VERBENACEAE (Vervain or Verbena Family) Verbena brasiliensis Brazilian Vervain Notice the square stems. * native to South America Wat is the leaf arrangement? VERBENACEAE (Vervain Familiy) Verbena halei named for J.P. Hale Slender Vervain, Texas Vervain, Blue Vervain What is the leaf shape? What is the stem shape? upside-down gingerbread man?
6 Packet #8 St. Edwards Park September 22 nd Page 6 of 9 * SCROPHULARIACEAE (Snapdragon Family) Verbascum thapsus (native of Eurasia) Common Mullein, Velvet Dock, Cowboy s Toilet Paper... How do we describe the leaf surface? Can you identify the male and female parts? The leaves are used medicinally, including in the form of cigarettes for treating asthma. TYPHACEAE (Cat-tail Family) Typha latifolia Broadleaf Cat-tail, Common Cat-tail Cat-tails can filter run-off flowing into lakes keeping the lakes healthy. They also help prevent erosion and provide habitat to several species of birds and other animals. Rhizomes, young shoots, and pollen are edible. Is this a monocot or a dicot?
7 Packet #8 St. Edwards Park September 22 nd Page 7 of 9 ASTERACEAE (Sunflower Family) Ambrosia trifida The sap is blood red (stain). Blood Ragweed, Giant Ragweed What is the leaf arrangement? leaf surface? How do you think this plant got its specific epithet? FABACEAE (Legume or Bean Family) Desmodium paniculatum paniculatum means flowers in panicles Panicled Tick-Clover What is the leaf complexity? leaf arrangement? Study the fruits. How do you think the seeds are dispersed?
8 Packet #8 St. Edwards Park September 22 nd Page 8 of 9 CYPERACEAE (Sedge Family) Cyperus odoratus Sedges have edges, rushes are round... Fragrant Flat Sedge Do you think this is a monocot or a dicot? Why? SAPINDACEAE (Soapberry Family) Cardiospermum halicacabum Common Balloonvine, Heartseed Vine Greek: cardia, heart, and sperma, seed, referring to the white, heart-shaped spot on the seed. (?) Fruits will float, adding dispersal distance. Can you find the stigmas? What is the leaf complexity?
9 Packet #8 St. Edwards Park September 22 nd Page 9 of 9 ANACARDIACEAE (Sumac or Cashew Family) Toxicodendron radicans Do NOT Touch!! Poison Ivy, Poison Oak This plant s habit varies from a low-creeping shrub to an erect shrub to a low- or high-climbing vine. Causes contact dermatitis in most people due to resinous phenolic compounds commonly known as urushiols. What is the leaf arrangement? What is the leaf complexity? Leaf shape and leaf margin can be quite variable!!
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