SPECIES AND VARIETIES. 245 



(115) Pimpinella. BUKNET SAXIFRAGE. 



P. Saxifraga : stems erect, 1-2 feet high, slightly branched, 

 glabrous; leaves usually pinnate, with 7-9 pairs of broadly 

 ovate or orbicular toothed segments, those of the stem bipin- 

 natifid with linear segments; umbels terminal, with 10-15 

 rather slender rays ; flowers white. Pastures, roadsides, etc. 

 PL July, August. 



P. magna: larger and stouter than the last; the stems 

 often two feet high or more ; leaf-segments usually undivided, 

 ovate or lanceolate, with more pointed teeth ; flowers pink. 

 Shady places. Fl. July, August. 



(116) Bupleumm. 



B. rotundifolium : annual ; stems erect, stiff, glabrous, one 

 foot or more high, branched above ; leaves broadly ovate, the 

 upper ones embracing the stem, and joined round the back of 

 it, so that they appear perfoliate, the lowest ones tapering to 

 a stalk; umbels terminal of 3-6 short rays, without any 

 general involucre, the partial involucres very much longer than 

 the flowers, consisting of 4-6 broadly ovate, yellowish bracts. 

 Harems-ear, or Thorow-wax. Cornfields in chalky soils. Fl. 

 July. 



B. aristatum, and B. temiissimum, are very rare dwarf 

 annual species with grassy leaves, the first with non-granulated, 

 the second with granulated fruits. 



(117) (Enanthe. 



* Segments of the upper leaves few, long and linear. 

 CS. fistulosa: stems thick, hollow, erect, 2-3 feet high, 

 slightly branched; radical leaves twice pinnate, with small 

 cuneate segments divided into 35 lobes, those of the stem 



