10 MIDDLESEX FLOEA. 



Raphanus, L. 

 R. Raphanistrum, L. Wild Radish. Jointed Charlock. 

 A common weed in cultivated fields. May-July. Nat. from Eu. 



Hesperis, L. 



H. matronalis, L. Rocket. 

 Reading, escaped ( W. H. Manning) ; Maiden, persistent for ten years 

 in one locality and spreading (F. S. Collins) ; Stoneham (B. F. 

 Gordon) ; Arlington (L. L. Dame). Appears to be sparingly 

 established. June. Nat. from Eu. For description, see Wood's 

 Bot. & Fl. 



Tropidocarpum, Hook. 



" Pod linear, flattened laterally, often one-celled by the disappear- 

 ance of the narrow partition ; valve carinate, one-nerved. Seeds in 

 two rows, minute, flattened, not winged; cotyledons incumbent. 

 Style short. A low, slender, hirsute, branching annual, with 

 pinnately divided leaves, and yellow solitary axillary flowers." 

 Bot. Cal. 



T. gracile. Hook. 

 Wool-waste, N. Chelmsford (Rev. W. P. Alcott ; specimen in herb, 

 of). Adv. from Cal. 



*' Stems weak, 2 feet high or less ; leaves pinnatifid or I'arely 

 2-pinnatifid, with narrow or linear segments ; flowers in the axils 

 of the upper bract-like leaves ; petals li to 3 lines long, nearly 

 twice longer than the obtuse sepals; pods 6 to 20 lines long, more 

 than a line broad, pointed at botli ends, ascending on slender 

 spreading pedicels 10 to 20 lines long." Bot. Cal. 



VIOLACE/E. VIOLET FAiVilLY. 



V. rotundifolia, Michx. Round-leaved Violet. 



Townsend (Miss H. E. Haynes) ; Framingham, rare (Rev. J. H. 



Temple) ; Ashby, rare (L. L. Dame) ; Concord, introduced from 



Vermont by Minot Pratt. April-May. 

 V. lanceolata, L. Lance-leaved Violet. 



Common. April-June. 

 V. primulifolia, L. Prijirose-leaved Violet. 



Less common than the preceding. April-June. 

 V. blanda, Willd. Sweet White Violet. 



Common. April-June. 

 V. ODORATA, L. English Violet. 



Ashland, sparingly naturalized (Rev. Thos. Moroug; specimen 



in herb. of). Int. from Eu. 



