. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. Genus CHICORY FAMILY. 3°5 8. Hypochaeris. 9. Apargia. 10. Picris. ii. Ptiloria. 12. Tragopogon Chondrilla. Leontodon. Sonchus. Lactuca. Pappus of rounded scales, with or without an inner series of bristles. Bracts of the involucre 9-18, reflexed in fruit, not keeled; pappus-bristles usually more numerous than the scales. Annuals; pappus-scales 5, obovate or rou
. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. Genus CHICORY FAMILY. 3°5 8. Hypochaeris. 9. Apargia. 10. Picris. ii. Ptiloria. 12. Tragopogon Chondrilla. Leontodon. Sonchus. Lactuca. Pappus of rounded scales, with or without an inner series of bristles. Bracts of the involucre 9-18, reflexed in fruit, not keeled; pappus-bristles usually more numerous than the scales. Annuals; pappus-scales 5, obovate or rounded. 4. Krigia. Perennials; pappus-scales 10-15, linear or oblong, minute. 5. Cynthia. Bracts of the involucre 5-8, erect in fruit, keeled; pappus-bristles and scales 5. t> ,,.,.. 6. Cymbia. .Bracts of the involucre thickened and keeled after flowering; pappus none. 7. Amoseris. ** Pappus, at least some of it, of plumose bristles. Receptacle chaffy. Receptacle naked. Plume-branches of the pappus not interwebbed. Flowers yellow; plants scapose, the leaves basal. Flowers yellow; plants leafy-stemmed. Flowers pink. Plume-branches of the pappus interwebbed. *** Pappus of simple bristles or of some soft white scales. t Receptacle with a few deciduous bristles; flowers yellow 13. Malacothrix. tt Receptacle naked. 1. Achenes spinulose, or with short processes near the summit. Heads few- (6-15-) flowered, yellow; stem branching. 14, Heads many-flowered, yellow, solitary on scapes. 15. 2. Achenes smooth, or papillose, not spinulose toward the summit, (a) Achenes flattened. Achenes truncate, not beaked; flowers yellow. 16. Achenes narrowed at the summit, or beaked; flowers blue or yellow. 17. (b) Achenes cylindric, or prismatic. Achenes terete, not narrowed either at the base or summit; flowers pink or purple. 18. Lygodesmia. Achenes narrowed at the base, narrowed or beaked at the summit; flowers yellow. Achenes slender-beaked. Pappus-bristles not surrounded by a villous ring at bas
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
