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 102nd meridian . la much longer thanthe calyx, its tube gradually much enlarged upward, its limb strongly 2-lipped; upper lipconcave, rounded, nearly or quite entire; lower lip spreading, 3-lobed, the middle lobe com-monly emarginate. Stamens 4, didynamous, ascending under the upper lip of the corolla, thelower pair the longer; filaments pubescent; anthers all alike, 2-celled, the sacs nearly
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 102nd meridian . la much longer thanthe calyx, its tube gradually much enlarged upward, its limb strongly 2-lipped; upper lipconcave, rounded, nearly or quite entire; lower lip spreading, 3-lobed, the middle lobe com-monly emarginate. Stamens 4, didynamous, ascending under the upper lip of the corolla, thelower pair the longer; filaments pubescent; anthers all alike, 2-celled, the sacs nearly parallel,the margins of their valves commonly spinulose or denticulate. Ovary 4-parted. Nutletsovoid-triquetrous, smooth. [Greek, dragon-head.] About 7 species, natives of North America, known as False Dragon-head or : Dracocephalum virginianum L. Type Flowers 9 long, or more; leaves firm. Spike dense, many-flowered. Spike loose, few-flowered; leaf-serrations mostly s-7 long; leaves thin. Spike loose; 4-8 long; leaves few and distant. Spike dense, i-4 long; stem leafy. 1. D. virginianum. 2. D. denticulatum. 3. D. intermedium. 4. I. Dracocephalum virginianum L. Dragon-head. Obedient Plant. LionsFig- 3599- Dracocephalum virginianum L. Sp. PI. 594. 1753. Dracocephalum speciosum Sweet, Brit. Fl. 93. 1825. Physostegia virginiana Benth. Lab. Gen. & 1834. Stem erect or ascending, rather stout, sim-ple or branched above, i°-4° tall. Leavesfirm, lanceolate, oblong-lanceolate, or linear-lanceolate, acuminate at the apex, sharplyserrate or serrulate, narrowed at the base,the upper all sessile, 2-5 long, 2-y wide,the lowest petioled; bracts lanceolate, shorterthan the calyx; spikes dense, becoming 4-8long in fruit, many-flowered; flowering calyxcampanulate or somewhat turbinate, its teethovate, acute, about one-half as long as thetube; fruiting calyx oblong, 4-5 long, theteeth much shorter than the tube; corollapale
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
