Pityopsis flexuosa (Nash) Small

국표에는 없다.

Pityopsis is a genus of North American plants in the tribe Astereae within the family Asteraceae. Species of Pityopsis are known by the common names silkgrass or golden asters or grass-leaved goldenasters .Species

• Pityopsis aspera (Shuttlw. ex A.Gray) Small – Pineland silkgrass - LA MS AL GA FL SC NC VA TN
• Pityopsis falcata (Pursh) Nutt. – Sickleleaf silkgrass - ONT NY MA CT RI NJ FL
• Pityopsis flexuosa (Nash) Small – Zigzag silkgrass - FL
• Pityopsis graminifolia (Michx.) Nutt. – Narrowleaf silkgrass - Bahamas, Belize, Honduras, Chiapas, Oaxaca, Veracruz, Tamaulipas, United States (TX LA MS AL GA FL SC NC VA MD DE WV OH KY TN AR OK)
• Pityopsis microcephala (Small) Small - FL SC TX
• Pityopsis oligantha (Chapm. ex Torr. & A.Gray) Small – Grassleaf goldaster - USA (TX LA MS AL GA FL)
• Pityopsis pinifolia (Elliott) Nutt. – Taylor County goldaster - USA (AL GA SC NC)
• Pityopsis ruthii (Small) Small – Ruth's golden aster - TN

Pityopsis - Wikipedia

Field Description: Perennial herb 12 -20 inches tall with 1 - 6 zigzagging stems. Leaves are linear, 1.5 -2 inches long, and gradually become shorter and narrower toward the stem apex. Flower heads are yellow, 1 inch across, with 9 - 13 ray florets. Similar Species: The small yellow flower heads of the closely related Chrysopsisspp. and Heterotheca subaxillaris look similar to zigzag silkgrass, but lack the zigzagging stem and linear leaves. Zigzag silkgrass can be distinguished from pineland silkgrass (Pityopsis aspera) and grassleaf goldenaster (Pityopsis oligantha) by having basal leaves shorter than the cauline leaves. Narrowleaf silkgrass (Pityopsis graminifolia) lacks the zigzagging stem and has an involucre (series of bracts surrounding the inflorescence) shorter than the pappus (modified calyx surrounding the petals), while zigzag silkgrass has an involucre equaling the pappus. Related Rare Species: No other silkgrasses native to Florida are considered rare. Other rare aster family species in the FL Panhandle sandhills include Gholson's blazing star (Liatris gholsonii) and Godfrey's blazing star (Liatris provincialis).

Pityopsis_flexuosa.docx (fnai.org)

 

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