Chinese Hemlock Parsley

Plants 50–100 cm. Root dark brown, branched. Stem branched. Basal and lower petioles ca. 5 cm, sheaths narrow-ovate; blade ovate to triangular-ovate, 15–20 × 10–15 cm, 2–3-ternate-pinnate; pinnae petiolulate, pinnules ovate, 1–5 × 0.5–3 cm; ultimate segments linear, 3–7 × 1–3 mm. Umbels ca. 5 cm across; bracts 1–2, linear, 1–1.5 cm, narrowly scarious-margined; rays 10–13, 2–3 cm, subunequal, slightly scabrous; bracteoles 5–8, linear, 0.5–1 cm. Petals obovate. Stylopodium low-conic. Fruit oblong to ellipsoid, ca. 5 × 4 mm, dorsally compressed; dorsal ribs prominent, narrowly winged, lateral ribs broad-membranous-winged; vittae small, 1 in each furrow, 4 on commissure. Fl. and fr. Aug–Oct. n = 22.

Anhui, Jiangxi [Japan, Russia; North America].

Mountain ravines, stream banks; ca. 1000 m.

Conioselinum chinense (L-.) B.S.P. Prel. Cat. N. Y. 22. 1888
Athamanta chinensis L. Sp. PI. 245. 1753.
Apium bipinnatum Walt. Fl. Car. 115. 1788.
Selinum canadense Michx. Fl. Bor. Am. 1: 165. 1803.
Cnidium canadense Spreng. in R. & S. Syst. Veg. 6: 415. 1820.
Liguslicum Gmelini Cham. & Schlecht. Linnaea 1: 391. 1826.
Laser pitium hirsulum [H. & A. in] Hook. Fl. Bor. Am. 1 : 270. 1832. Not L. hirsutum Lam. 1778.
Cnidium chinense Spreng.; Steud. Nom. Bot. ed. 2. 1: 389, as syn. 1840.
Kreidion chinensis Raf. Good Book 57. 1840.
Conioselinum ? canadense T. & G. Fl. N. Am. 1: 619. 1840.
Conioselinum Fischeri Hook, and other authors. Not C. Fischcri Ledeb. 1844.
Conioselinum kamtschaticum Rupr. Beitr. Pfl. Russ. Reich. 11: 22. 1859.
Selinum pacificum S. Wats. Proc. Am. Acad. 11: 140. 1876.
Selinum Bentliami S. Wats. Bibl. Ind. 432. 1878.
Conioselinum bipinnatum Britton; J. Northrop, Bull. Torrey Club 14: 233. 1887.
Selinum Hookeri S. Wats.; Coult. & Rose, Rev. N. Am. Umbell. 45. 1888.
Conioselinum Gmelini Coult. & Rose, Contr. U. S. Nat. Herb. 7: 150. 1900. Not C. Gmelini Steud.
1840. Conioselinum pacificum Coult. & Rose, Contr. U. S. Nat. Herb. 7: 152. 1900. Conioselinum pumilum Rose; Rydb. Torreya 12: 9. 1912. Conioselinum Benthami Fernald, Rhodora 28: 221. 1926. Conioselinum Gmelini var. kamtschaticum Hult6n, Fl. Aleut. Is. 248. 1937. Conioselinum Gmelini i.foliosum Hulten, Fl. Aleut. Is. 249. 1937.
Rather stout, sparingly branched, 3-15 dm. high; leaves ovate to deltoid in general outline, excluding the petioles 8-20 cm. long, 5-20 cm. broad, 1-2-pinnate or 1-2-ternate-pinnate, the leaflets lanceolate to ovate, 10-45 mm. long, 10-25 mm. broad, pinnatifid, the lobes acute, entire or toothed; petioles 5-15 cm. long; cauline leaves with dilated oblong sheaths; peduncles 6-18 cm. long; involucre of several narrow, entire or toothed, foliaceous bracts, 0.5-2 cm. long, or these sometimes replaced by dissected leaves, or the involucre wanting; involucel of few to numerous, filiform to linear, scarious-margined bractlets, 5-15 mm. long, shorter or longer than the flowers, sometimes foliaceous, elongate and divided; rays 13-30, subequal, 15-45 mm. long; pedicels 5-8 mm. long; fruit oblong-oval to oval, 4-6 mm. long, 2-3.5 mm. broad, the dorsal ribs acute, unwinged, the laterals broadly winged; seed much flattened dorsally in cross section, the face plane. »
Type locality: " Chinensem dixit Barthram qui semina misit ex Virginia," apparently a mistake for the "Genesee country," western New York, Bartram.
Distribution: Cold swamps; Labrador, Newfoundland, Quebec, and Maine, south to North Carolina and west to Minnesota and Missouri; Alaska and the Aleutian Islands, Northwest Territory to northern California, along the coast; Siberia and the Kurile Islands. (Fernald &" 25ms/: 25,930, Jones 29,027.)