lilac. The following is a list of the plants on which it is known to 

 occur: 



Alder (Alnus rugosa Spreng.). 

 Almond (Prunus sp.), China. 

 American aspen {Populus tremuloides 



Michx.). 

 American bladdernut {Staphylea trifolia 



Linn.). 

 Amorpha sp., exotic. 

 Apple (Pyrus mains Linn.). 

 Apple, crab {Pyrus sp.). 

 Apricot (Prunus armeniaca Linn.). 

 Arrow-wood ( Viburnum spp.). 

 Ash (Fraxinus americana Linn.), {F. ex- 

 celsior Linn.), {Fraxinus spp.). 

 Balm of Gilead {Populus balsamifera 



Linn.). 

 Basswood {Tilia americana Linn.), {T. 



angustifolia, from Germany). 

 Beech {Fagus atropunicea Sudw.). 

 Bilberry ( Vacdnium myrtillus Linn.). 

 Birch, white {Betula populi/olia Ait.). 

 Birch, river {Betula nigra Linn.). 

 Bittersweet {Celasirus sp.). 

 Blackthorn {Prunus spinosa Linn.). 

 Box {Buxus sempervirens Linn.). 

 Boxelder {Acer negundo Linn.). 

 Broom {Cytisus scoparius Link.), Gurnsey. 



{C. nubigenus Link.), from Gurnsey (?). 

 Buckeye {jEscuIus glabra Wild.). 

 Buckthorn {Rhamnus cathartica Linn.). 

 Butternut {Juglans cinerea Linn.). 

 Calluna sp., Sweden. 

 Camellia sp. 

 Camphor tree {Camphora officinalis 



Steud.). 

 Cassia sp., in greenhouse. 

 Cherry (Prunus sp.). 

 Chestnut (Castayiea americana Raf.). 

 Clematis paniculata Thunb. 

 Cocoa palm from Barbados. 

 Cotoneaster sp. 

 Cranberry ( Vaccinium sp.). 

 Currant, black (Ribes nigrum Linn.). 

 Currant, red (Ribes rubrum Linn.). 

 Dogwood (Corn us alba Linn.), (C. alba var. 



sibirica Lodd.), (?C. altema Marsh), (C. 



calif ornica C. A. Mey), (C. sanguinea 



Linn.). 

 Elm, English (Ulmus campesfm Smith). 

 Elm, purple-leaved ( Ulmus scabra, var. 



purpurea Koch). 

 ? Euphorbia palustris Linn., CJermany. 

 [Cir. 121] 



False bittersweet (Celastrus scandens 



Linn.). 

 Fig (Ficus carica Linn.). 

 Filbert (Corylu^ sp.). 

 Ginseng (Panax quinquefolium Linn.). 

 Gooseberry (Ribes cynosbati Linn.). 

 Goatsbeard (Aruncus Sylvester Kost.). 

 Grape ( Vitis vini/era Linn.). 

 Hackberry (Celtis ocddentalis Linn.). 

 Hawthorn (Crataegus crus-galli Linn.), (C. 



oxyacantha Linn.). 

 Helianthemum chamsedslu^ Mill., Eng- 

 land. 

 Heath (Erica sp.), England and Sweden. 

 Heather (Calluna sp.). 

 Holly (Ilex crenata Thunb.). 

 Honeysuckle (Lonicera sp.). 

 Hop tree (Ptelea trifoliata Linn.). 

 Horse-chestnut (^sculv^ hippocastanum 



Linn.). 

 Horena duleis Thunb. 

 June-berry (Amelanchier spp.). 

 Leather leaf (Chamxdaphne calyculata 



Moench). 

 Lilac (Syringa persica Linn.), (S. vulgaris 



Linn.). 

 Lime (Citrus sp.). 

 Linden. (See Basswood.) 

 Locust, cultivated (Robinia pseudacacia 



Linn.). 

 Locust, water (Gleditsia aquatica Marsh). 

 Maple, striped (Acer pennsylvanicum 



Linn.). 

 Maple, sugar (Acer saccharinum Linn.). 

 Maple, mountain (Acer spicatum Lam.). 

 Mespilus cuneata Miq., Japan. 

 Mosse-wood (Dirca palustris Linn.). 

 Mountain ash (Sorbus americana Marsh). 

 Mountain ash, European (Sorbus aucu- 



paria Linn.). 

 Myrtle (Myrtus sp.), Egypt. 

 Nectarine (Prunus sp.). 

 New Jersey tea (Ceanothus americanus 



Linn.). 

 Oak (Quercus pedunculata Ehrh.), (()uer- 



cus spp.), Germany. 

 Orchid. 



Pachysandra terminalis Sieb. & Zucc. 

 Peach (Prunus persica Sieb. & Zucc). 

 Pear (Pyrus communis Linn.). 

 Pear, Sickle. 



