16 MIDDLESEX FLORA. 



S. aquatica, Scop. 



" Newton ville, Aug., 1881, beside the R. R. track," (C. J. Sprague.) 

 Spechnen'in 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 dichotomous cymes terminat- 

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

 faintly 1-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, 



CERASTIUM, 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) ; 

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

 Rare. May-June. 



SAGINA, L. 



S. procumbens, L. PEARLWORT. 



Walthani (C. E. 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 SPURREY. 



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

 Nat. from Eu. 



