142 37. UMBELLIFER^. 



13. BUNIUM Linn. Pig-nut. 



1. B. flexuosum (With.); general involucre of 1 3 leaves, 

 partial more numerous,//*, oral narrowing upwards crowned with 

 the elongated stylopode and erect styles, interstices with 3 vittae. 

 E.E. 988. B.denudatum DC. Involucres sometimes altogether 

 wanting. Root a solitary tuber. St. a foot or more high, very 

 slender below, bearing a few 1. with linear segments. Radical 1. 

 triternate with long footstalks tapering downwards. Sandy and 

 gravelly pastures. P. V. VI. 



2. B. Bulbocastanum (L.) ; general and partial involucres of 

 many leaves, fr. oblong crowned with the short stylopode and 

 reflexed styles, interstices with single vittae. E. B. S. 2862. 

 Carum Koch, DC. Involucres always present. Lower 1. bipin- 

 nate, with a triangular outline, rather numerous near the base of 

 the stem, rarely 1 or 2 radical upon long footstalks tapering down- 

 wards. Chalky fields in Camb. and Herts. P. VI. VII. . 



14. Pi M PI NELL A Linn. Burnet-Saxifrage. 



1. P. magna (L.); I. pinnate, leaflets all ovate serrate some- 

 what cut the terminal one 3-lobed, st. angularly striate. E. B. 

 408. St. 1 2 feet high, leafy. Lateral leaflets sometimes 

 3-lobed. Styles longer than the ovary, as long or longer than 

 the oval fruit. Shady hills. P. VII. VIII. E. I. 



2. P. Saxifraga (L.) ; 1. pinnate, leaflets of the lower 1. 

 roundish-ovate serrated somewhat cut, those of the stem-L bipin- 

 natifid with linear segments, st. terete, ped. glabrous. E. B. 407. 

 St. 1 2 feet high, naked above. Styles shorter than the 

 ovary. L. sometimes all pinnatifid. [P. nigra (Willd.) has 

 densely pubescent peduncles.] Dry pastures. P. VII. IX. 



15. SIUM Linn. 



* Vitta superficial. Lateral ridges marginal. Stylopode de- 

 pressed. SIUM Koch. 



1. S. latifolium (L.) ; 1. pinnate, Its. oblong-lanceolate equally 

 serrate pointed, inv.-l. many lanceolate. E. B. 204. St. 3 5 

 feet high, angular, furrowed, erect. L. of 9 13 very large 

 distant Its. Umbels terminal. Ditches and rivers, rare. P. 

 VII. VIII. 



** Vitta deeply seated. Lateral ridges not marginal. Sty- 

 lopode shortly conical. BERULA Koch. 



2. S. angustifolium (L.) ; 1. pinnate, leaflets unequally lobed 

 and cut ovate, of the stem-1. lanceolate, inv. of many lanceolate 



