200 NATURAL HISTORY OF PLANTS. 



under these solitary more or less evolute, sometimes very thin or ; 

 carpophore "undivided;" stylopods depressed conical and entire. 

 Seed semiterete or transversely oblong, face flat or rather convex, 

 sometimes in middle slightly or deeply sulcate or concave (Ammiopsis), 

 more rarelymore or less- involute; coat thin; albumen homy; cotyledons 

 of small inverted subapicular embryo short ; radicle terete superior. — 

 Annual or biennial herbs-^ oftener odorous, glabrous or setosely or 

 coarsely pubescent or hispid ; root sometimes thick conical. Leaves 

 alternate, pinnately decompound ; segments narrow or linear ; petiole 

 dilated at base to a sheath ; flowers in compound terminal or oppo- 

 sitifolious umbels ; rays few or oo , sometimes short, at maturity open 

 or oftener incurved connivent ; bracts of involucre few or 0, sometimes 

 CO , entire or broadly membranous, sometimes all or part dissected ; 

 bracteoles of involucels few or oo , entire or 3-fid, sometimes dissected 

 {Ammiopsis), sometimes 0. (All cold and temp, regions.) — See p. 84. 



2. Fsammogeton Edgew." — Flowers nearly of Damns ; calyx 

 scarcely perceptible ; petals unequal, broad obovate, from impressed 

 rib above and dilated margin spuriously 2-lobed ; styles slender ; 

 stylopods conical entire. Fruit subovoid; mericarps semiterete. 

 Carpophore 2-fid. Primary and secondary ridges filiform ; the former 

 more prominent ; all 1-seriately sprinkled with rather long filiform 

 hairs, capitate at apex ; vittse solitary under secondary ridges. Seed 

 somewhat compressed ; face flat or rather concave. Other characters 

 of Daucus. — A glabrous or canescent annual ; leaves twice or thrice 

 3-sect ; laciniae sniall hnear ; flowers ^ in compound umbels ; invo- 

 lucres and involucels membranous-oo -bracteate. ' (Persia, E. Indies.^) 



3. Exoacantha Labill.* — Flowers hermaphrodite (nearly of 

 Daucus) ; calyx inconspicuous or ; petals subequal ; point inflexed ; 

 spuriously 2-lobed from intruded rib. Stylopods pulvinate, subentire. 

 Primary and secondary ridges slightly obtusely prominent, subequal 

 or the latter rather smaller. Vittae thin solitary in furrows. Carpo- 

 phore 0. Face of seed nearly flat. — Glabrous annuals ; leaves pin- 

 nate ; segments of upper entire ; umbels compound ; rays unequal, 



• Trans. Linn. Soc. xx. 57. — B. H. Gen. 929, rilis) ; Fl. Or. ii. 1078. — Walp. Ann. i. 



n. 147.— Hook. Fl. Ind. ii. 719. 355. 



2 White or pink. . ■• Icon. ¥1. Syr. dec. i. 10, t. 2.— DC. Froir. 



3 Spec. 3. Boiss. Ann. So. Hat. ser. 3, i. 131 iv. 236.— Endl. Gen. n. 4523.— B. H. Gen. 927, 

 {Pimpinella) ; Diagn. Or. ser. 2, ii. 99 {To- n. 143. 



