MIDDLESEX FLORA. 89 



spatulate or oblanceolate, about an inch long, mostly opposite; 

 bracts similar, narrower, awned at the apex; heads small; invol- 

 ucres 1)^ to 2 lines long, unequally toothed (the alternate teeth 

 smaller), usually margined ; teeth strongly uncinate ; flowers very 

 shortly pedicelled, narrowed at base, 1}4 lines long, glabrous or 

 often villous on the nerves, shortly cleft ; segments equal, oblong, 

 entire ; filaments more or less adnate to the lower part of the tube. 

 Bot. Cal. 



LAURACE/E. LAUREL FAMILY. 



Sassafras, Nees. 



S. officinale, Nees. 

 Common. Apr. 



LiNDEEA, Thunb. 



L. Benzoin, Meisn. Spice-Bush. Benjamin Bush. 

 Common. Apr. 



THYMELEACEyE. MEZEREUM FAMILY. 



DmcA, L. 



D. palustris, L. Lbatheewood. Moosewood. Wicopt. 

 Townsend, rare (Miss H. E. Haynes). Concord, introduced from 

 Vt. by Minot Pratt. Apr. 



Daphne, L. 



D. Mezeeeum, L. Daphne. 

 Medford, persistent in two localities for many years, without much 

 tendency to spread. Apr. Nat. from Eu. For description see 

 "Wood's Bot. & M. 



SANTALACE/E. SANDALWOOD FAMILY. 



COMANDRA, Nutt. 



C. umbellata, Nutt. Bastard Toad-flax. 

 Common. May-June. 



CERATOPHYLLACEvE. HORNWORT FAMILY. 



Ceratophtllum, L. 



C. demersum, L. Hoenwort. 

 Cambridge (Rev. Thos. Morong) ; Newton (F. S. Collins). 



