64 PENTANDRIA. 



39. ULMUS. Perianth single, inferior, persistent, 4 5-cleft. 

 Caps, membranous, compressed, 1 -seeded. 

 (Scl-eranthus, DECANDR.) 



*** Flowers of 5 petals, superior, 2-sacdcd. UMBELLATE. 

 A. Umbels unth a partial and universal involucre. 



42. ERYNGIUM. Flowers sessile, capitate. Receptacle conical, 

 chaffy. Fruit bristly. 



43. HYDROCOTYLE. Flowers in a simple umbel or capitate. 

 Cal. 0. Petals ovate, acute, equal, Fruit without teeth (or 

 calycine segments) , suborbicular, laterally compressed, striated. 



44. SANICULA. Umbellules clustered, subcapitate, central flow- 

 ers abortive. Petals obcordate. Fruit clothed with hooked 

 bristles. 



52. HERACLEUM. Involucres deciduous. Flowers radiant. Pe- 

 tals bifid. Fruit elliptical, dorsally compressed, striated. 



57. (ENANTHE. Flowers radiant, those of the disk sessile and 

 abortive. Fruit crowned with the Cal. and Styles, corky. 



45. CAUCALIS. Involucres undivided. Flowers radiant, those 

 of the disk abortive. Fruit subovate, striated, rough with rigid 

 bristles. 



46. DAUCUS. Involucres pinnatifid. Flowers somewhat radiant, 

 those of the disk abortive. Fruit muricated. 



50. PEUCEDANUM. Gen. involucre very short. Flowers nearly 

 uniform, those of the disk abortive. Fruit ovate, compressed, 

 striated, bordered. 



48. CONIUM. Partial involucres of ,3 leaves, all on one side. 

 Petals nearly uniform. Fruit ovate, tumid, with 5 undulated 

 ribs on each side. 



47. BUNIUM. Partial involucres setaceous (often wanting). Pe- 

 tals uniform. Fruit oblong, striated, with the interstices tu- 

 berculated. 



55. SIUM. Involucres of many leaves. Petals heart-shaped, 

 nearly uniform. Fruit nearly oval, laterally compressed and 

 striated. 



49. SELINUM. Involucres, general and partial, reflexed. Petals 

 heart-shaped nearly uniform. Fruit compressed, striated down 

 the middle. 



5 1. CRITHMUM. Cal. entire. Petals uniform, entire, broadest at 

 the base, their extremities curved inwards. Fruit oval, striated. 



53. LIGUSTICUM, Gen. involucre membranaceous. Petals um- 

 form, incurved at the extremity, entire. Cal. of 5 teeth. Fruit 

 oblong, furrowed. 



54. ANGELICA. Gen. involucre often wanting. Petals uniform, 

 incurved, entire. Fruit roundish with three wings on each 

 side. 



56. SISON. Gen. and part, involucre of about 4 leaves (the 



