293 
(1) Frondescence, or leafing: When the buds first open and exhibit 
the green leaf. 
(2) Flowering: When the anther is first exhibited—() in the 
most favorable location; (6) general flowering of the species. 
(3) Fructification: When the pericarp splits spontaneously in 
dehiscent fruits or the indehiscent fruit is fully ripe. 
(4) Fall or leaf: When the leaves have nearly all fallen. 
List of plants recommended for observation by the Smithsonian Institution. 
Pages of 
Gray’s Man- 
ual of Botany. 
Edi- _ Edi- 
tion VI. tion V. 
118] 19 
7} 119 
117 119 
289 265 
48 47 
48 47 
116 118 
Wi6-|> “118° | 
116 118 
107 110 | 
166 162 | 
132 130 
| 
38 | _ 88 
46| 45 
315 | 292 
341 | 395 
50 50 
320 299 
398 321 
479 | 455 
468 448 
147 144 
152 148 
152 149 
7 401 
47 48 
91 98 
322 207 
214 200 
166 160 
165 160 
165 * 159 
315 293 
188 177 
528 533 
335 401 
311 289 
389 335 
108 107 
| Amorpha fruticosa L 
| Asclepias cornuti Decaisne 
Genera. 
Common names. 
Acer rubrum L-.....- 
Acer dasycarpum Ebrh._---_-----_------- 
Acer saccharinum L 
Achillea millefolium T-_---------.------ 
ING SEN TAU ove NU UG | os te Ee 
Actea alba Bigelow 
Aesculus hippocastanum L 
Aesculus glabra Willd 
‘Aesculusilava Aits22 25. -52- -_-22+-2 
Aclantus plang ulosasss spe se nas ee 
Amelanchier canadensis 
Amygdalus nana La 
Anemone Memorosalies--- --2--4-22- === 
Aquilegia canadensis L 
Arctostaphylos uva-ursa (Spreng) 
Asimina triloba Dunal 
Azalea nudiflora L ; 
Bignonia (Tecoma) radicans (Juss) ---- 
Castanea vesca L 
Canyalallban<a2.5 5.22% 222s. soe es 
Cercis canadensis L -------. ------- 
Cerasus virginiana D.C- .-.------------- 
@erasus'setotinaD! C223 3—- nee 
Chionanthus virginica L 
Cimicifuga racemosa Ell 
Claytonia virginica L 
Clethravalnifoliaas----= 4 /scs55 2-265 22 
Cormus!floridanls: 222-24. ~=-55-----2252 
Crategus crus-galli L 
Cratezegus coccinea L 
Cratzgus oxycantha L 
Epige#a repens L 
Epilobium angustifolium L 
Erythronium americanum Smith _*_--- 
Fraxinus americana L 
Gaylussacia resinosa Torrey and Gray- 
Gerardia flava L 
Geranium maculatum L 
Red or soft maple. 
White or silver maple. 
| Sugar maple. 
| Millefoil or yarrow. 
| Red baneberry. 
| White baneberry; necklace weed. 
| Horse-chestnut. 
| Ohio buckeye. 
| Yellow buckeye. 
| Tree of heaven; ailanthus. 
| Shad bush; service berry. 
False indigo. 
| Flowering almond. 
Wind flower; wood anemone. 
Wild columbine. 
Bearberry.’ 
Milkweed. 
Papaw. 
Common red honeysuckle. 
Trumpet creeper. 
Chestuut. 
Shagbark or shellbark hickory. 
Redbud; Judas tree. 
Chokeberry or chokecherry. 
Wild black cherry. 
Fringe tree. 
Black-snake root; rattlesnake root. 
Spring beauty. 
White alder or sweet pepper bush. 
Flowering dogwood. (The real flower, 
not the white involucre. ) 
Cockspur thorn. 
Scarlet-fruited thorn. 
English hawthorn. 
Trailing arbutus; ground laurel. 
Willow herb. 
Dogtooth violet or adder’s-tongue. 
White ash. 
Black huckleberry. 
Yellow false foxglove. 
Crane’s bill. 
aThis genus of Rosacex is not in Gray’s Manual of Plants Indigenous to United States. 
