AZALEA 



AZOLLA 



123 



to New York. There are some forms and crosses of 

 this variety, of which the following may be recom- 

 mended : Caldwelli, with larger purple fls., Geert, 

 Ic.Az. 18 : Marvel, lilac-carmine, double, Flor. Mag. 

 11; 14; Princess Maud, rosy magenta, R.H. 1886: 516; 

 Mrs. Carmichael, crimson-magenta ; Princess Bea- 

 trice, bright mauve ; Prime Minister, soft pink ; Miss 

 Buist, pure white. 



15. rosmarinifdlia, Burm. (A. alba, Sweet. A. ledi- 

 fdlia, Hook. A. lilii flora, Poit.). Much branched, low 

 shrub, 1-3 ft.: branches, Ivs. and pedicels densely ru- 

 fously appressed-strigose : Ivs. elliptic or elliptic-lan- 

 ceolate, persistent, 1-3 in. long : fls. 1-3 ; calyx with 

 lanceolate serrate-glandular lobes ; corolla pure white 

 or rosy purple, 2-3 in. broad, fragrant ; stamens usually 

 10. May. China. B.R. 10:811. B.M. 2901. L.B.C. 13: 

 1253. -Some remarkable varieties of this species are 

 the following : Var. alba, Behder (A.Indica, var. alba, 

 Lindl. R. Itiicdnthnm, Bunge). Fls. white, sometimes 

 striped pink. Var. purpurea, Render (It. ledifolium, 

 T*r.jM*rprem, M*x.). Fls. rosy purple. Var. narcissi- 

 flora, Rehder (A. narcissiflbra, Fort.). Fls. double, 

 white; rarely purple. Var. punicea, Rehd. (A.punicea, 

 Sweet. A. ledifdlia, var. pluenicea, Hook. A. Indica, 

 var. calycina, Paxt.). Fls. single, purple; calyx with 

 linear, not serrate and less glandular lobes. B.M. 3239. 

 L.B.C. 18:1735. A. rosmarinifdlia has produced, with 

 A. Indica, a large number of beautiful hybrids, of 

 which one of the first was figured in 1833 as Rhododen- 

 dron pulchrum. 



AA. Fls. from lateral l-fld. buds toward the end of the 

 branches: corolla rotate campanulate, glabrous. 

 (Azalea strum.) 



16. albiflora, O. Ktze. (Rhododendron albifldrum, 

 Hook. ) . About 2-3 ft. : branches strigose and glandular 

 when young : Ivs. oblong, pale green, appressed-stri- 

 gose above and at the midrib beneath, slightly ciliate : 

 fls. nodding, on short pedicels ; corolla white, 5-cleft, 

 about 1 in. broad ; calyx glandular ; stamens 10. Rocky 

 Mts. B.M. 3670. 



A. Dahurica, Koch = Rhododendron Dahuricum. A. di- 

 anthiflbra, Carr.=A. rosmarinifolia, var. dianthiflora. A. dila- 

 tdta, O. Ktze. (R. dilatatum, Miq.) . Allied to A. rhombica. Lvs. 

 glabrous : stamens 5. Japan. A. Fdrrerce, Koch (A. squa- 

 mata, Lindl.). Allied to A. Schlippenbachi. Lvs. rhomboid- 

 ovate, somewhat coriaceous: fls. whitish pink, spotted. China. 

 B.R. 33:3. A. Japonica, Gray=A. Sinensis. A. Kamschdtica, 

 O. Ktze. (Rhododendron Kamschaticum, Pall.). Low or pros- 

 trate shrub, to 10 in. high : Ivs. obovate, setose : fls. 1-5, long- 

 peduneled, i%-2 in. broad, campanulate, purple. N. E. Asia, 

 N. W. Amer. Gt. 36:1260. A. Lapponica, Linn.= R. Lapponi- 

 cum. A. linearifblia, Hook. (R. linearifolium, Sieb. & Zucc.). 

 Allied to A. rosmarinifolia. Lvs. linear-lanceolate : corolla 



S'nk, deeply divided into 5 linear-lanceolate segments. April, 

 ay. Japan. B.M. 5769. A. macrosepala, O. Kuntze (R. macro- 

 sepalum, Maxim.). Height 1-2 ft.; branchlets densely villose : 

 Ivs. deciduous or semi-persistent, elliptic : fls. umbellate, rose- 

 lilac, spotted, about 2 in. broad; calyx pubescent-glandular. 

 Japan. Gt.19: (562. A. mucrondta, Blume=A. rosmarinifolia. 



A. obtusa, Lindl.=A. Indica, var. obtusa. A. ovata, Lindl. (R. 

 ovatum. Planch.). Allied to A. albirtpra. Height 2-12 ft.: Ivs. 

 ovate, glabrous: Us. pink or nearly white, spotted, rotate, !%-!% 

 in. broad: stamens 5. China. B. M. 5064. A. reticulata, Koch 

 =A. rhombica. A. semibarbdta, O. Kuntze (R. semibarbatum, 

 Maxim.). Allied to A. albiflora, Lvs. elliptic, crenately ciliate, 

 setose beneath : tts. greenish yellow, spotted purple, %-%in. 

 broad. Japan. Gt. 19: 666. A. serpyllifblia, Gray (R. serpylli- 

 folium, Miq.). Allied to A. Indica. Low, rigid shrub : Ivs. de- 

 ciduous, obovate, M-/m. long: fls. single, rosy red, %-%in. 

 broad. Japan. B.M. 7503.-A. Sieboldi, Miq.=A. Indica. A. 

 squamata, Lindl. =A. Farrerse. A. Tschonoskii, O. Kuntze (R. 

 Tschonoskii, Maxim.). Allied to A. Indica. Low shrub : Ivs. 

 elliptic, %-%in. long: fls. 2-4, white, %in. broad. Japan. 



ALFRED REHDER. 



AZABA (I. N. Azara, a Spanish promoter of science, 

 especially of botany) . Bixacece. Shrubs or small trees : 

 Ivs. evergreen, alternate, with usually enlarged and leaf- 

 like stipules : tts. small, in axillary peduncled racemes 

 or clusters, apetalous ; sepals 4-5 ; stamens numerous, 

 rarely 5 : fr. a many-seeded berry. About 20 species 

 in S. America, especially Chile. Handsome evergreen 

 shrubs, with small but fragrant fls., for warm temperate 

 regions ; probably only A. microphylla will thrive far- 

 ther north in a sheltered position and protected during 

 the winter. Grow best in a sandy compost of loam and 

 leaf soil. Prop, by seeds or cuttings of mature wood 

 in autumn, placed in slight bottom heat under glass. 



microphylla, Hook, f . From 3-12 ft. : Ivs. obovate, ser- 

 rate, or nearly entire, %-%in. long, shining, glabrous, 

 the stipules similar, but half the size : fls. greenish, in 

 few-fld. clusters; stamens 5: berries orange. Feb., Mar. 

 Chile. G.C. II. 1: 81. Graceful evergreen shrub, regu- 

 larly pinnately branched, excellent for covering walls ; 

 the hardiest of all the cultivated species. 



Gilliesi, Hook. & Arn. Height 10-15 ft. : Ivs. 2K-3 in. 

 long, broad-ovate, with coarse, spiny teeth, glabrous ; 

 stipules orbicular, much smaller : fls. in dense, elliptic, 

 nodding heads, yellow. Feb., Mar. Chile. B.M. 5178. 

 F.S. 23: 2445. The handsomest of all Azaras. 



A.crassifblia, Hort. = A. Gilliesi. A. dentdta, R. & Pav. 

 Height 12 ft.: Ivs. obovate or elliptic, crenate-serrate: fls. yellow, 

 in small corymbs. Chile. B.R. 21:1788. A. intearifblia, R. & 

 Pav. Height 10-20 ft.: Ivs. entire: fls. yellow, in oblong heads. 



ALFRED REHDER. 



AZOLLA (Greek, to destroy by drying). Salvinidcece. 

 A small genus of floating aquatics with small, pinnate 

 stems and minute fleshy 2-lobed Ivs., producing two 

 sorts of spores in globular sporocarps. The species mul- 

 tiply rapidly by self-division, but will grow readily in 

 water containing a little nutriment. The species are 

 distinguishable only by microscropic examination. 



Caroliniana, Willd. Plant %-l in. long : anchor-like 

 processes of spores with septa. N. Y. to the Gulf of Mex. 



filiculoldes, Lam. Plants 1-2 in* long : anchor-like 

 processes without septa. Calif, to Chile. 



L. M. UNDERWOOD. 



