. Rocky Mountain flowers : an illustrated guide for plant-lovers and plant-users. and persistent; achenes hairy; stems nearly leafless, 1- headed, 1-6 in. high //. acdulis b. Heads in cymes or clusters; rays 12-20, small and narrow; achenes smooth or nearly so;stems 5-2 ft. high; leaves oblong-ovate tospatulate H. Parryi 3. Bracts of the involucre more or less equal, with conspicuous leafy tips or passing into leaves ;pappus soft; leaves linear, entire ; rays 2-5 ornone a. Plants densely white-felted; heads about 1 in. high ; rays none - H. macroncma b. Plants not felted; heads 15-18 mm. high;
. Rocky Mountain flowers : an illustrated guide for plant-lovers and plant-users. and persistent; achenes hairy; stems nearly leafless, 1- headed, 1-6 in. high //. acdulis b. Heads in cymes or clusters; rays 12-20, small and narrow; achenes smooth or nearly so;stems 5-2 ft. high; leaves oblong-ovate tospatulate H. Parryi 3. Bracts of the involucre more or less equal, with conspicuous leafy tips or passing into leaves ;pappus soft; leaves linear, entire ; rays 2-5 ornone a. Plants densely white-felted; heads about 1 in. high ; rays none - H. macroncma b. Plants not felted; heads 15-18 mm. high; rays 2-5 or none . Helenium Linne 1753 Sneezeweed(The Greek name of some plant)(Dugaldea Cass.)PI. 41, fig. with yellow to orange pistillate or neutral ray-flowers, disk-flowers yellow, perfect, achenes top-shaped, ribbed, pappus of 5-8 entire, Plate 40 ASTER FAMILY 1. Bidens levis: Bur Marigold 2. Arnica cordifolia 3. Gaillardia aristata 4. Senecio Fendleri: Groundsel 5. Ximenesia encelioidcs 6. Actinella Richardsonii 7. Helianthella Parrvi PLATE EDITH S. CLEMENTS. PINXT ROCKY MOUNTAIN FLOWERS COCKAYNE. BOSTON HELIANTHELLA—HELIANTHUS 279 toothed or awned scales; receptacle convex to oblong, without chaff, in-volucre low hemispheric, the bracts in 1-2 rows, spreading or reflexed;heads solitary on the branches; leaves alternate, simple, toothed, oftendecurrent; annual or perennial. 1. Rays orange to purplish; stems not winged by the leaf-bases a. Rays 2-4 cm. long; leaves spatulate to lance- oblong, mostly entire H. lloopesii b. Rays about 1 cm. long; leaves linear to linear- lanceolate, usually parted into 3-5 linear di-visions //. helenioides 2. Rays bright yellow, 3-cleft at tip; stem winged by the decurrent bases of the lanceolate to lance-ovate leaves H. autumnale Helianthella Torrey and Gray 1840 Helianthella (Diminutive of Helianthus, which it resembles)PL 40, fig. with yellow neutral ray-flowers, disk-flowers yellow or purple,perfe
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectwildflo, bookyear1920
