293 



(1) Frondescence, or leafing: When the buds first open and exhibit 

 tlie green leaf. 



(2) Flowering: When the anther is first exhibited — {a) in the 

 most favorable location; {b) general flowering of the species. 



(3) Fnictification : \^'^len the pericarp splits spontaneously in 

 dehiscent fruits or the indehiscent fruit is fully ripe. 



(4) Fall or leaf: WTien the leaves have nearly all fallen. 



List uf plants recommended for ohservation hy the Smithsonian Institution. 



Pages of 

 Gray's Man- 

 ual of Botany. 



Edi- Edi- 

 tion VI. tion V. 



46 

 31.5 

 341 



50 



479 

 46K 

 147 

 153 



S37 

 47 

 91 

 322 

 214 



Acerrubrum L 



Acer dasycarpum Ehrh 



Acer saccharinum L 



Achillea millef oliuni L _ 



Actea rubra Willd 



Actea alba Bigelow 



Aesculus hippocastanum L 



Aesculus glabra Willd 



Aesculus flava Ait 



Ailantus glandulosa 



Amelanchier canadensis 



Amorpha fruticosa L 



Amygdalus nana La 



Anemone nemorosa L 



AquUegia canadensis L 



Arctostaphylos uva-ursa (Spreng) - 



Asclepias cornuti Decaisne 



Asimina triloba Dunal 



Azalea nudiflora L 



Bignonia (Tecoma) radicans (Juss) 



Castanea vesca L x -- 



Carya alba 



Cercis canadensis L 



Cerasus virginiana D. C 



Cerasus serotina D. C 



Chionanthus virginica L 



Cimicif uga racemosa Ell 



Claytonia virginica L 



Clethra alnif olia 



Cornus florida L 



Crataegus crus-galli L 



Crataegus coccinea L 



Crataegus oxycantha L 



Epigsea repens L 



Epilobium angusti folium L 



Erythronium amt-ricanum Smith 



Fraxinus americana L 



Qaylussacia resinosa Torrey and Gray. 



Gerardia flava L 



Geranium maculatum L 



103 

 a This genus of Rosacese is not in Gray's Manual of 



Common names. 



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; ailanthua. 



Shad bush; service berry. 



False indigo. 



Flowering almond. 



Wind flower; wood anemone. 



Wild columbine. 



Bearben-y. 



Milkweed. 



Papaw. 



Common red honeysuckle. 



Trumpet creeper. 



Chestnut. 



Shagbark or shellbark hickory. 



Redbud; Judas tree. 



Chokeborry or (-hokecheiTy. 



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 laun-l. 

 Willow herb. 



Dogtooth violet or adder's-tongue. 

 White ash. 

 Black huckleberry. 

 Yellow false foxglove. 

 Crane's bill. 

 Plants Indigenous to United States. 



