AMMIACEAE 873 



or nearly so ; ribs mostly winged, 7 of them prominently winged, the other 3 sometimes 

 nearly wingless. 



In woods and on banks, Ontario to Minnesota. Florida and Arkansas. Spring and summer. T. 

 barbinode Chapmdnii Coult. & Rose, has more finely divided leaf-segments and puberulent. fruit ; it 

 occurs in southern Georgia and northern Florida. 



3. Thaspium pinnatifidum (Buckl. ) A. Gray. Often finely pubescent. Stems 5-12 

 dm. tall, more or less widely branched : leaf-blades 5-15 cm. long, once to twice ternately 

 compound ; basal longer than the rest ; segments 1-2-pinnatifid, rather delicate, suggesting 

 those of leaf-blades of many FUMARIACEAE : umbels peduncled, 2-4.5 cm. broad; rays 

 7-14, usually quite uniform in length : corolla light yellow, 2.5-3 mm. broad: fruit ob- 

 long, barely 5 mm. long, all ribs winged, 3-5 of the wings commonly narrower than the rest. 



In woods and copses, North Carolina to Kentucky and Tennessee. Spring and summer. 



34. CONIOSELINUM Hoffm. 



Perennial, caulescent herbs, with glabrous foliage. Leaves alternate : blades 2-3 pin- 

 nately decompound, the alternate segments narrow, incised or lobed. Flowers perfect, in 

 compound umbels. Involucres and involucels of several narrow bracts or the former 

 wanting. Hypanthium truncate. Corolla white : petals inflexed at the tip. Disk with a 

 round-conic stylopodium. Fruit longer than broad, dorsally flattened : carpels with the 

 dorsal and contiguous ribs prominent and the lateral ones winged : oil-tubes 2-3 in the inter- 

 vals, and 4-8 in the inner face. HEMLOCK PARSLEY. 



1. Conioselimim Chine'nse (L. ) B.S.P. Stems 5-15 dm. tall, simple or sparingly 

 branched above : leaf-blades twice compound, the lower long-petioled, the upper short-peti- 

 oled or nearly sessile ; segments acute, incised : umbels peduncled, 5-10 cm. broad : bracts 

 narrow or wanting : rays 9-20, slender, 2-4 cm. long : pedicels 6-8 mm. long : corolla white, 

 3-4 mm. broad : fruit oval or oblong-oval, 4-5 mm. long, rather prominently winged, the 

 faces prominently ridged. [C. (?) Canadense T. & G.] 



In swamps and on wet cliffs, Labrador to Minnesota, New York and Indiana and in the mountains 

 to North Carolina. Summer and fall. 



35. ANGELICA L. 



Perennial caulescent heavy -scented herbs. Leaves alternate : blades pinnate or decom- 

 pound : leaflets usually toothed. Flowers perfect, in compound umbels. Involucres and 

 involucels present or wanting. Hypanthium truncate, or sepals small. Petals white or 

 greenish, broadest above the middle, inflexed at the tip. Disk with a rounded stylo- 

 podium. Fruit longer than broad, dorsally flattened : carpels with the dorsal and contigu- 

 ous ribs prominent, and broadly winged lateral ribs : oil-tubes solitary or several in the 

 intervals and 2-10 in the inner face. ANGELICA. 



Peduncles and rays pubescent. 1. A. villosa. 

 Peduncles and rays glabrous. 



Leaflets thin ; lobes ascending : oil-tubes 1-3 in each interval. 2. A. Curtisii. 



Leaflets leathery ; lobes spreading : oil-tubes about 20, contiguous and continuous. 3. A. dentata. 



1. Angelica villosa (Walt.) B.S.P. Foliage glabrate below, tomentose above. 

 Stems 6-18 dm. tall, commonly branching above : leaf-blades once or twice ternately com- 

 pound : leaflets thickish, oblong, oblong-lanceolate or oval, 2-5 cm. long, serrate : umbels 

 dense, becoming looser, 3-8 cm. broad : rays 7-30, 2-5 cm. long : pedicels slender, 3-4 

 mm. long : corolla white : fruit oval or obovate, 5-6 mm. long, finely pubescent, broadly 

 winged ; oil-tubes generally 3-6 in each interval. [4. hirsuta Muhl.] 



In rocky woods and dry soil, Connecticut to Minnesota. Florida and Tennessee. Summer. 



2. Angelica Curtisii Buckl. Foliage glabrous, at least below. Stems 6-18 dm. tall, 

 commonly branched above : leaf-blades twice ternately compound, 1-4 dm. long, long- 

 petioled : leaflets thinnish, ovate to lanceolate, sharply serrate or incised, acuminate : 

 umbels 5-15 cm. broad : rays 12-25, ascending, 3-10 cm. long : pedicels 6-12 mm. long : 

 corolla greenish : fruit oblong or oval, 4-6 mm. long, broadly winged, glabrous, notched 

 at the base ; oil-tubes mostly solitary in the intervals. 



In woods on mountain slopes and summits, Pennsylvania to Georgia. Summer and fall. 



3. Angelica dentata (Chapm. ) Coult. & Kose. Foliage glabrous to the inflorescence. 

 Stems 5-10 dm. tall, simple or branching above : leaf-blades ternately compound : petioles 

 longer than the blades: leaflets rather remote, thickish, oblong to lanceolate, acute, 1-2.5 

 mm. long, incised or incised-serrate : umbels solitary or few, 3-8 cm. broad : rays 5-12, 

 1-4 cm. long : corolla white : fruit oval, 5-6 mm. long, glabrous or minutely pubescent, 

 broadly winged ; oil-tubes about 20, continuous, 8 on the commissural side. 



In dry pine lands, Florida. Summer. 



