16 MIDDLESEX TLOEA. 



8. aquatica, Scop. 

 " Newtonville, Aug., 1881, beside the E. E. track," (C. J. Sprague.) 

 Specimen-ia herb. B. S. N. H. This should not be confounded with 

 S. aquatica, Pollich, of the Man. 1st Ed., which is S. uliginosa, 

 Murr. Adv. from Eu. 



" Stem diffusely branched, decumbent. Flowering stems branched 

 below the cyme. Leaves ovate, acute or acuminate; the lower 

 ones on footstalks shorter than the laminae, the middle and upper 

 ones sessile. Flowers numerous, in dichotomoijs cymes terminat- 

 ing the stem and branches. Sepals lanceolate, rather obtuse, 

 faintly l-nerved, with broad scarious margins, the herbaceous 

 part with short gland-tipped hairs. Fruit stalks spreading or 

 reflexed. Capsule drooping, longer than the sepals, ovate-conical. 

 Stem with short gland-tipped hairs." Sowerby, Eng. Bot., 11.91, 



Ceeastium, L. 



C. viscosuM, L. Mouse-ear Chickweed. 



Common. April-Sept. Nat. from Eu. 

 C. arvense, L. Field Chickweed. 



Concord (H. S. Richardson) ; Ashland (Rev. Thos. Morong) ; 



Framingham (Miss J. W. Williams) ; Medford (C. E. Perkins). 



Rare. May-June. 



Sa&ina, L. 



S. procumbens, L. Pearlwoet. 

 Waltham (0. B. Perkins) ; Ashland (Rev. Thos. Morong) ; Med- 

 ford (F. S. Collins). Sometimes growing in brick sidewalks ; scarce. 

 June-July. 



Lepigonum, Fries. 



L. rubrum. Fries. (Spergularia rubra, Presl, var. campestris, 



Man.) 



Rather common. May-Aug. 

 L. salinum. Fries, (Spergularia salina, Presl, Man.) 



Salt marshes; Cambridge (C. E. Perkins) ; Medford-(F. S.Collins). 



July. 

 L. medium. Fries. (Spergularia media, Presl, Man.) 



Salt marshes ; Medford and Everett (F.. S. Collins) . July. 



Spergula, L. 



S. ARVENSis, L. Corn Spureey. 

 Lowell, Cambridge, Concord, et al. Not uncommon. June-Aug. 

 Nat. from Eu. 



