This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol2", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
[Archangelica Hoffm. Gen. Umb. 166. 1814.]
Tall erect perennial branching herbs, with compound leaves and large terminal umbels of white flowers (in our species). Involucre none, or of a few small bracts. Involucels of several small bracts, or sometimes wanting. Calyx-teeth obsolete or small. Petals with an inflexed tip. Stylopodium depressed. Fruit ovate or oval, dorsally compressed, pubescent or glabrous. Dorsal and intermediate ribs prominent, approximate, the lateral ones broadly winged. Oil-tubes solitary, several or numerous in the intervals, 2-10 on the commissural side. Seed-face flat or somewhat concave. [Named for its supposed healing virtues.]
About 40 species, natives of the northern hemisphere and New Zealand. Besides the following, some 18 others occur in the southern and western parts of North America. Type species: Angelica Archangelica L.
Umbels glabrous, or nearly so; leaf-segments acute or acutish.
Oil-tubes 1 (rarely 2-3) in the intervals; wings broader than the carpels.
Oil-tubes numerous and contiguous; wings narrower than the carpels.
Umbels densely tomentose; leaf-segments obtuse.
Glabrous, or the umbels and upper part of the stem slightly pubescent, 2°-3 1/2° high. Leaves biternate, the divisions quinate or pinnate, the lower long-stalked, the upper mostly reduced to inflated petioles; segments rather thin, sometimes slightly pubescent on the veins beneath, ovate, acute or acuminate, sharply and irregularly dentate or incised, 2'-4' long; umbels 3'-6' broad, 9-25-rayed; rays rather stout, 1Y-3' long; pedicels slender, 4"-6" long, fruit oval, glabrous, 2"-3" long, emarginate at the base, the lateral wings broader than the carpel; oil-tubes solitary or sometimes 2 or 3 in the intervals; seed adherent to the pericarp.
Angelica atropurpurea L. Sp. Pl. 251. 1753.
Angelica triquinata Michx. Fl. Bor. Am. 1: 167. 1803.
Archangelica atropurpurea Hoffm. Umbel. 161. 1814.
Stout, 4°-6° high, glabrous throughout, or the umbel slightly rough-hairy. Lower leaves often 2° wide, biternate and the divisions pinnate, the upper ones smaller, all with very broad dilated petioles; segments oval or ovate, acute or acutish, rather thin, sharply serrate and often incised, 1 1/2'-2' long; umbels sometimes 10' broad, 9-15-rayed, the rays 2'-4' long; pedicels very slender, 4"-8" long; fruit broadly oval, 3"-4" long, slightly emarginate at the base, the lateral wings narrower than the carpels; oil-tubes numerous and contiguous; seed becoming loose from the pericarp.
In swamps and moist ground, Newfoundland to Ontario, Minnesota, south to Delaware, Illinois and Iowa. June-July. Aunt Jerichos. Archangel. Masterwort.