24 MIDDLESEX FLORA. 



T. HYBRIDUM, L. AlSYKE. 



This plant, occasional throughout the county, has within a few 

 years become thoroughly established in the eastern and southern 

 sections. June-Aug. Nat. from Eu. 



"Heads roundish, dense; peduncles axillarjr, twice the length of 

 the leaves ; pedicels deflexed after flowering, the inner twice or 

 thrice the length of the calyx tube ; calyx smooth with naked 

 throat, half the length of the corolla, with subulate teeth, the two 

 upper longer; stems ascending, very smootli, hollow; stipules 

 ovate, attenuate to a very acute point ; leaves rhomboidal-elliptic, 

 obtuse, serrulate. Lower leaves obovate; flowers white to rose- 

 color." Koch, Syn. Fl. Germ. 



T. REPENS, L. White Clover. 



Very common. Possibly indigenous, but probably introduced 



from Eu. May-Sept. 

 T. AGRARiuM, L. Yellow or Hop-Clover. 



Widely distributed, but not very common. June-Aug. Nat. from Eu. 



T. PROCUMBENS, L. LOW HOP-ClOVER. 



Medford, Groton, et al. Not so common as the preceding. July. 

 Nat. from Eu. Form known as var. minus, Koch, occasional. 



T. Dalmaticum, Vis. 

 Lowell, "dump" (Dr. C. W. Swan). Adv. f rom Eu. 

 "Heads terminal and axillary, the axillary sessile or nearly so; 

 calyx naked at the base ; stipules dilated, at least the upper; calyx 

 teeth not longer than the tube ; calyx sulcate in fruiting ; flowers 

 red ; stems decumbent, with appressed hairs." Cesati, Passerini 

 and Gibelli, Flora Italiana. 



T. Macraei, Hook and Am. 

 Wool-waste, N. Chelmsford (Rev. W. P. Alcott). Adv. from Cal. 

 " Somewhat villous, with appressed or spreading hairs, erect, 

 slender, a half to a foot high ; stipules ovate to lanceolate ; leaflets 

 obovate to narrowly oblong, obtuse or retuse, serrulate, about half 

 an inch long ; flowers dark purple, 3 lines long, in dense ovate long- 

 peduucled heads, calyx very villous ; the straight teeth as long as 

 the petals, often tinged with purple; pod 1-seeded." Bot. Cal. 



Melilotus, Tourn. 



M. parvijlora^ Desf . 

 Lowell, "dumps;" Westford, woollen-mill yards (Dr. C. W. 

 Swan). 



" Annual, smooth, erect, often 2 or 3 feet high, branching ; leaflets 

 mostly cuneate-oblong, obtuse, denticulate, an inch long or less; 



