282 



ANDROMEDA 



ANDROSACE 



The andromedas are low evergreen shrubs with small 

 and narrow foliage and small pinkish flowers in terminal 

 umbels. They are perfectly hardy North and suited 

 for borders of evergreen shrubberies and for rockeries 

 and grow best in peaty or sandy and moist soil and in 

 half-shady positions. 



Propagation is by seeds, sown thinly soon after matur- 

 ity, in pots or pans of sandy peat soil, placed in a cool 

 frame. They germinate easily if sown in cut sphag- 

 num, but must be pricked into boxes as soon as they 

 can be handled. Cuttings from mature wood, placed 

 in sand under glass in fall, and kept in a cool green- 

 house during the winter, will root easily; also increased 

 by layers. See, also, Leucolhoe, Chamsedaphne, Pieris 

 and Zenobia. 



polifolia, Linn. (A. rosmarinifblia, Pursh). Fig. 197. 

 One-half to 2 ft.: branchlets usually not glaucous: lys. 



narro.w-oblong to lin- 

 ear, %-l l A in. long, 

 whitish-glaucous be- 

 neath, but not to- 

 mentose, later some- 

 times green, revolute 

 at the margin: fls. 

 nodding on slender 

 pedicels, 2-4 times as 

 long as the globose- 

 urceolate corolla: 

 caps, brownish, ob- 

 ovoid or subglobose, 

 t as high as broad. 

 June. N. Eu., N. 

 Asia, rare in the 

 colder regions of N. 

 'Amer. L. B. C. 18: 

 1714. G.W. 12, p. 50 

 (habit) . Varies with 

 narrower and broader 

 Ivs. On account of its 

 slender-stalked fls., 

 more graceful than 

 the following species, 

 glaucophylla, Link. 

 Similar to the pre- 

 ceding, but young 

 branchlets glaucous: Ivs. white beneath, with a fine 

 tomentum: fls. on curved thick pedicels, rarely twice 

 as long as the urceolate corolla: caps, depressed, 

 glaucous. June. N. E. Amer., south to Minn, and Pa. 

 L.B.C. 6:546; 16:1591; 18:1725. Varies like the pre- 

 ceding species with broader and narrower Ivs. 



A. acuminata, Ait.=Leucotho populifolia. A. arbdrea, Linn. 

 =Oxydendrum arboreum. A. axiU&ris, Michx.=Leucothoe Cates- 

 bffii. A. axillaris, Lam.=L. axillaris. A. calyculnta, Linn.=Cha- 

 mffidaphne calyculata. A. campanula, Miq.=Enkianthus cam- 

 panulatus. A. cdndida, Hort.=Zenobia pulverulenta. A. cas- 

 jtiniaefdlia, Vent.=Z. pulverulenta. A. C&tesbxi, Walt.=Leucothoe 

 Catesbsei. A. ctrnua, Miq.=Enkianthus cernuus. A, dealbAta, 

 Lindl.=Zenobia pulverulenta. A. faztigiata, Wall.=Cassiope fas- 

 tigiata. A. ferruginea, Walt.=Lyonia ferruginea. A. floribdnda, 

 Pursh=Pieris noribunda. A. formdsa, Walt. =Pieris formosa. A. 

 glaitca, Hort.=Zenobia pulverulenta. A. jap6nica, Thuab.= 

 Pieris japonica. A. ligustrina, Muhl.=Lyonia ligustrina. A. 

 mariana, Linn.=Pieris mariana. A. nitida, Bartr.=Pieris nitida. 

 A. otaU/filia, Wall.=Pieris ovalifolia. A. paniculAla, Ait.= 

 Lyonia ligustrina. A. parabfilica, Duham.=L. ligustrina. A. pop- 

 ulifdlia, Lam.=Leucothoe populifolia. A, -pulverultnta, Bartr.= 

 Zenobia pulverulenta. A. racemdsa, Linn.=Leucothoe racemosa. 

 A. ipecioaa, Michx.=Zenobia pulverulenta. A. tetrdgona, Linn. 

 =Cassiope tetragona. A. tomentbaa, Hort., not Dum.-Cours.= 



197. Andromeda polifolia. (x%) 



Lyonia ligustrina pubescens. 



ALFRED REHDEB. 



ANDROPOGON (Greek, aner, man, and pogon, 

 beard, referring to the silky hairs on the spikelets of 

 some species). Graminex. BEARD-GRASS. Annual or 

 mostly perennial grasses of various habit but usually 

 with coarse foliage, scarcely horticultural. 



Spikelets in pairs at each joint of an articulate rachis, 

 one sessile, perfect, 1-fld.; the other pedicelled, stami- 

 nate, neutral or reduced to a pedicel; glumes of fertile 



spikelet equal, indurated, the first dorsally compressed, 

 the second keeled; sterile and fertile lemmas hyaline, the 

 latter usually awned; palea minute or wanting: rachis 

 usually hairy, often conspicuously so. A large genus of 

 probably 200 species, widely distributed in both hemi- 

 spheres except in the colder regions. Includes several 

 important native forage grasses such as blue-stem or 

 blue-joint (A. furcalus, Muhl.) with about 3 digitate 

 spikes at the summit of the tall culm; and little blue- 

 stem (A. scoparius, Michx.), with single spikes scattered 

 along the branches, both species of the prairie region. 

 Broom sedge (A. virginicus, Linn.), a common grass of 

 the Atlantic states, is considered troublesome, though 

 it has some forage value before it flowers. Some of the 

 species, such as silver beard-grass (A. argenteiis, DC.), 

 are ornamental on account of the silvery panicles. This 

 is a stout grass, 2-4 ft., with bearded nodes and long- 

 stalked oval panicles consisting of numerous woolly 

 ascending or appressed spikes. 



Several species of oil-producing grasses formerly 

 included in Andropogon are now referred to other 

 genera. A. Ndrdus, Linn.=Cymbopogon Nardus, 

 Rendle. A. citratus, DC.=Cymbopogon citratus, DC. 

 A. Schoendnthus, Linn.=Cymbopogpn Schoenanthus, 

 Spreng. A. squarrosus, Linn.=Vetiveria zizanioides, 

 Nash. 



For a discussion of the sorghums and Johnson-grass 

 referred by some authors .to Andropogon, see Holcus; 

 also Vol. II, Cyclo. Amer. Agric. A. S. HITCHCOCK. 



ANDROSACE (old Greek name of no significance 

 here). Primulacex. ROCK JASMINE. Small tufted plants 

 grown in the alpine garden. 



Root-lvs. clustered: scapes mostly not exceeding 

 8 in. high, often very short: fls. mostly pink, red and 

 purplish, sometimes white, primula-like but con- 

 stricted at the throat, umbellate or solitary, in early 

 spring. Over 80 species in Eu., Asia, N. Amer. and 

 Pacific Isls. Pax and Knuth, Engler's Pflanzenreich. 

 hft. 22:172-220. 



Many species of rock jasmine are known in European 

 gardens, and they are much prized by fanciers in alpine- 



ardening. The tufted leaves sit close to the rocks, 

 ome of them are woolly-leaved. Only currently cata- 

 logued species are included in the present account. 

 A well-drained soil, partial shade, free circulation of 

 air, frequent waterings in dry summer months, and 

 protection from heavy fall and spring rains, will lead 

 to success with these charming alpines. A heavy sha- 

 ding of evergreen boughs in winter will be found of great 

 benefit. Close covering is not to be recommended, 

 because it smothers the plants. Very many species 

 have been tried in this country, with variable and not 

 very encouraging results, but in a few instances, with 

 extra care, plants have done well. The northern aspect 

 of a steep rockery seems to be the most favorable posi- 

 tion for them. Propagation is by division, seeds or cut- 

 tings. Plants should be kept in pots until thoroughly 

 established. The species are biennial or perennial 

 except in group AAA below. Many of them are densely 

 cespitose. 



Aizoon, 6. 

 angustifolia, 12. 

 arachnoidea, 7. 

 bntfantiaca, 9. 

 !in!l< anna, 6. 

 carnea, 9. 

 Chumbyi, 3. 

 chumyienee, 3. 

 cocci nea, 6. 

 coronopifolia, 12. 



INDEX. 



eximea, 10. 

 follosa, 4. 

 Halleri, 9. 

 hedrieantha, 8. 

 Henryi, 1. 

 imbricata, 11. 

 Jacquemontii, 7. 

 lactca, 10 

 lactiflora, 12. 

 Laggeri, 9. 



lanuginosa, 2. 

 odoratissima, 7. 

 pauciflora, 10. 

 Reverchonii, 9. 

 robuata, 7. 

 rosea, 9. 



sarmeptosa, 3, 4. 

 spJDulifera, 5. 

 villosa, 7. 



A. Los. long-petioled, large, orbicidar-renifarm or cordate, 



lobed or crenate. 



1. Henryi, Oliver. Scape 3-9 in., woolly, 12-25-fld.: 

 Ivs. to 2J/j) in. across, orbicular-reniform, lobed and 

 toothed: fls. white. China. 



