ACER 



ACHILLEA 



205 



1:86. A. B6sti\ t Spach. Probably hybrid. A. raonspessulanumX 

 tataricura. A, brevilobum, Hesse=A. parviflorum. A. caesium, 

 Wall. Allied to A. insigne. Tree: Ivs. 5-lobed, glabrous, whitish 

 beneath, 6-8 in. across; lobes acuminate, obtusely crenu late-ser- 

 rate. Himalayas. Not hardy N. A. capillipes, Maxim. Allied to 

 A. rufinerve. Tree, to 30 ft.: Ivs. 3-lobed, glabrous beneath, red 

 when unfolding, 3^-5 in. long: fls. on slender stalks about Hin. 

 long. Japan. S.T.S. 1 : 16. Not perfectly hardy at the Arnold 

 Arboretum. A. cauddtum, Brandis A. acuminatum. A. cin- 

 erdscens, Boiss. Shrub or small tree: lys. 3-lobed, H~2 in. long. 

 Similar to A. monspessulanum. Persia. A. coridceum, Tsch. 

 (A. creticum, Tratt. A. polymorphum, Spach). Probably A. 

 creticum X pseudoplatanus. A. crdssipes, Pax. Supposed to be a 

 hybrid between A. obtusatum and A. pennsylvanicum. A. 

 crdssipes, Hesse=A. parviflorum. ,4.. creticum. Linn. = A. ori- 

 entale. A. creticum, Tratt. =A. coriaceum. A. Dieckii, Pax (A. 

 platanoides var. integrilobum, Zabel). Similar to A. platanoides, 

 but lobes entire; probably A. Lobelii x platanoides. A. distylum, 

 Sieb. & Zucc. Allied to A. oblongum. Tree: Ivs. ovate, 5-7 in. long, 

 cordate, crenately serrate, light green and lustrous beneath. Japan, 

 G.C. II. 15:499. S.I.F. 2:41. J.H.S. 29:76. X. Durettii, Pax. 

 Probably A. monspessulanum X pseudoplatanus. A. eridnthum, 

 Schwerin. Allied to A. caudatum. Small tree: Ivs. 5-lobed, 2-3 Yi 

 in. long, lobes broad, unequally and simply serrate, nearly glabrous 

 beneath: fls. with densely villoua disk. W. China. S.T.S. 1:80. 

 A. F&rgesi, Franch. (A. Uevigatum var. Fargesii, Veitch). Allied 

 to A. oblongum. Tree, to 30 ft.: Ivs. coriaceous, lanceolate-ob- 

 long, 2-3 Yz in. long, narrowed at the base, penninerved, glabrous, 

 light green beneath, not reticulate. W. China. J.H.S. 29:91. 

 A. flabelldtum, Rehd. Allied to A. Oliverianum. Tree, to 30 ft.: 

 Ivs. 7-lobed, deeply cordate, 3-5 in. across, light green beneath 

 and villous along the veins. Cent. China. S.T.S. 1 : 81. A, 

 Franch&ii, Pax. Tree, to 15 ft.: Ivs. 3-lobed; slightly pubes- 

 cent beneath or glabrous at maturity and light green, 3-4 in. long; 

 lobes broadly ovate, acute, remotely toothed: fls. in short pubes- 

 cent racemes from lateral leafless buds, with the Ivs. : fr. with 

 the wings spreading at right angles or less, nutlets thick, hairy: 

 winter-buds with numerous imbricate scales. Cent. China. S.T.S. 

 1:87. Belongs to the section Lithocarpa. A. fulvescens, Rehd. 

 Allied to A. pictum. Tree, to 60 ft.: Ivs. usually 3-lobed. 2-4 

 in. across, beneath covered with a yellowish or fulvous pubes- 

 cence. W. China. Hardy at the Arnold Arboretum. A. hetero- 

 phyllum, Willd.=A. orientale. A. Hookeri, Miq. Allied to A. 

 Davidii. Tree, 60 ft.: Ivs. cordate-oblong, serrate, 4-6 in. long, 

 quite glabrous beneath. Himalayas. A. hybridum, Spach. Prob- 

 ably A. italum X pseudoplatanus. A, hybridum, Baudr.=A. 

 Boscii.' A. kevigcUum, Wall. Allied to A. oblongum. Small tree: 

 Ivs. oblong, nearly entire, attenuate at the base, penninerved, 

 green beneath. Himalayas, China. A, Isevigdtum, Hort. = A. 

 acuminatum. A. Lobelii, Ten. Allied to A. cappadocicum. 

 Branches glaucous: Ivs. rounded at the base; lobes mostly undu- 

 lated, abruptly pointed. Italy. A. Maximowiczii, Pax (A. urophyl- 

 lum, Maxim.). Allied to A. Tschonoskii. Small tree: Ivs. 3-5-lobed, 

 doubly serrate, the middle lobe much elongated, long-acuminate, 

 glaucescent beneath, glabrous, 2-3 in. long: fr. slender-stalked; 

 wings spreading at an obtuse angle. Cent. China. S.T.S. 1:84. 

 A. Mdyrii, Schwerin. Allied to A. cappadocicum and A. amplum. 

 Tree with smooth bark: Ivs. usually 3-lobed, glabrous, 3 in. across; 

 lobes very broad, long-acuminate: wings of fr. upright, incurved. 

 Japan. A. mexicdnum, Pax (Negundo mexicanum, DC. A. ser- 

 ratum. Pax). Allied to A. Negundo. Lfts. 3, pubescent beneath, 

 densely serrate: fr. glabrous; wings spreading at an acute angle. 

 Mex. A.micrdnthum, Sieb. & Zucc. Allied to A. Tschonoskii. Shrub 

 or small tree: Ivs. 5-7-lobed; lobes incised and doubly serrate, gla- 

 brous: fls. and fr. small. S.Z. 1:141. S.I.F. 2:44. A.neapolitanum, 

 Ten.=A. obtusatum. A. neglectum, Lange (A. zoeschense, Pax). 

 Probably A. campestre X Lobelii. Var. Annae, Schwerin. Young Ivs. 

 deep red, later olive-green. M.D. 1908:1. A. obtusdtum, Waldst. & 

 Kit. (A. neapolitanum, Ten.). Allied to A. Opal us. Small tree or 

 shrub: Iva. 5-lobed, pubescent beneath, about 4 in. across; lobes 

 broad, often rounded, obtusely denticulate: wings of fr. spreading 

 at a right angle or less. S. Eu., N. Afr. H.W. 3, p. 47. Tender at 

 the Arnold Arboretum. A. orientale. Linn. (A. creticum, Linn. A. 

 sempervirens, Linn. A. heterophyllum, Willd.). Allied to A. mon- 

 spessulanum. Shrub, 4 ft.: Ivs. nearly evergreen, short-stalked, 

 orbicular or oval, entire or 3-lobed, 1 A~1 1 A in. long, glabrous. 

 Orient. A. parviflorum, Franch. & Sav. (A. crassipcs, Hesse, not 

 Pax. A. brevilobum, Hesse). Allied to A. caudatum. Tree: Ivs. 

 3-5-1obed, pubescent beneath, 4-6 in. across; lobes broadly ovate, 

 acute, doubly serrate: wings of fr. spreading at an obtuse angle. 

 Japan. S.I.F. 2:42. Not quite hardy at the Arnold Arboretum. 

 A. pectindtum, Wall. Allied to A. pennsylvanicum. Tree: Iva. 

 3-lobed, setosely serrulate, 2 %-3 % in. across, the middle lobe 

 elongated, acuminate. Himalayas. G.C. II. 15:365. A. Perdnai, 

 Schwerin. Supposed hybrid of A. Opalus X monspessulanum. 

 Originated at Vallombrosa near Florence. A.robustum, Pax. Allied 

 to A. palmatum. Small tree: Ivs. 7-9-lobed, cordate, 3-4 in. across, 

 glabrous beneath except the tufts of hairs in the axils of the veins; 

 lobes ovate, acuminate, sharply serrate: wings of fr. nearly hori- 

 zontally spreading. Cent. China. A. rotundilobum, Schwerin 

 (A. barbatum. Booth, not Michx.). Possibly A. obtusatum X 

 monspessulanum. A. Schwerinii, Pax. Affinity doubtful. Lvs. 

 coriaceous, ovate-oblong, cordate, undivided or 3-lobed, glau- 

 cous beneath, soon glabrous, 5-7 in. long: fls. and fr. unknown. 

 Probably from the Himalayas. Var. marmoraium, Schwerin, has 

 the Ivs. variegated with light green. Var. monophy'llum, Schwerin, 

 has the Ivs. 23^ in. long. A. sempeTvirena, Linn.=A, orientale. 

 A. serrdtum, Pax=A. mexicanum. A. sikkimenae, Miq. Allied 

 to A. Davidii. Tree: Ivs. cordate-ovate, coriaceous, long-acu- 

 minate, quite glabrous, entire or serrulate, 4-7 in. long: wings of fr. 

 spreading at a right angle. Himalayas. A. sinenne, Pax. Allied 



to A. Oliverianum. Tree : Ivs. 5-lobed, cordate or sometimes 

 truncate, glaucescent beneath, glabrous, 3-6 in. long; lobes ovate, 

 acuminate, sparingly appressed-serrate : panicle elongated: wings 

 of fr. spreading horizontally. Cent. China. S.T.S. 1:78. J.H.S. 

 29:92. A. tterculidceum. Wall. (A. villosum. Wall.) Allied to A. 

 Franchetii. Tall tree: Ivs. 3-5-lobed, cordate, 6-8 in. acroas, 

 tomentose below, coarsely serrate: racemes from lateral leafless 

 buds: fr. in long pendulous racemes, often branched at the base; 

 wings of fr. nearly upright. Himalayas. A. autckuenense, Franch. 

 (A. sutchuense, Pax). Allied to A. mandshuricum. Small tree: 

 Ifts. 3, oblong-lanceolate, unequally serrate, glaucous beneath. 

 1M-3 in. long: corymb many-fld. t rather dense. Cent. China. 

 S.T.S. 2:112. Probably not in cult.; the plant figured by 

 Veitch under this name is A. Henryi. A, tegmentdsum, Maxim. 

 Allied to A. pennsylvanicum. Lvs. 3-4 in. long, glabrous beneath; 

 lobes short: fls. small. Manchuria. G.C. II. 15:75. A. trlfidum, 

 Hook. & Am. Allied to A. tataricum. Small tree: Ivs. coriaceous, 

 cuneate-obovate, 3-lobed, glaucous beneath, glabrous, 2-3 in. 

 long; lobes entire. China, Japan. S.Z.2: 143. A. uropkyllum, 

 Maxim.=A. Maximowiczii. A. Veitchii, Schwerin. Possibly 

 A. cratcegifolium xrufinerve. A. villdsum,Wa\l.=A, sterculiaceum. 

 A. Wtlsonii, Rehd. Allied to A. Oliverianum. Tree: Ivs. 3-lobed, 

 light green beneath, glabrous, 3^-4 in. across; lobes ovate to 

 oblong-ovate, acuminate, entire, or sparingly serrate: panicle 

 elongated: wings of the fr. spreading at a right angle. Cent. China. 

 S.T.S. 1:79. A. zceachense, Pax=A. neglectum. 



ALFRED REHDER. 



ACERANTHUS (Acer, maple, and anthos, flower, in 

 allusion to the maple-like flowers). Berberidacese. 

 BARRENWORT. A genus of 4-6 species of slender, 

 hardy, herbaceous perennials from Temp. Asia and 

 Algeria, related to the native twin-leaf, Diphylleia. Fls. 

 variously colored, racemose; sepals 7-8, petaloid, the 



102. Achillea MiUefolium var. rubrum. 



outer ones smaller than the inner; petals flat: Ivs. 

 solitary. Not commonly cult, and the following seen 

 only in botanic gardens. 



A. diphyllus, Morr. & Decne. (Epimedium diphyllum, Lodd.). 

 Plant rhizomatous: Ifts. obliquely cordate, green above, glaucous 

 beneath: fls. small, bluish white. Japan. B.M. 3448. L.B.C. 



N. TAYLOR. 



AC HANI A: Malvaviscus. 



ACHILLfeA (its virtues said to have been discovered 

 by Achilles). Compdsitse. Includes Ptarmica. About 

 100 species, some of which are hardy herbaceous bor- 

 der and alpine perennials of easy culture. 



Leaves simple or compound, often ternate: fl.-heads 

 small, corymbose or racemose; receptacle nearly flat 



