254 TJ.M15KLLIFEK/E. J/i/drucoh/lr. 



-t- +- Fruit somewhat couipresaitl dorsuUy ; tlio dorsal ribs rutlier naiTowly winged ; the lateral 

 wings broader, distinct : styloijodiiun somewhat proniiueut : seed bulcuto or concave : tall 

 herbs, with wliile Mowers. 



18. Ligusticum. Dorsal ribs narrowly winged; oil-tubes several in the intervals, obscure; seed 

 reniloiin in section. 



It). Beliaum. Dorsal wings Ijroader ; oil-tnbos solitary : seed nearly Hat on the face. 



•i- -i- +■ l'"ruit much llattened dorsally. 



++ Lateral wings broad, distinct, the dorsiil more or less prominent : seed concave on the face or 



nearly Hat. 



20. Angelica. Dorsal wings narrower than the lateral : oil-tubes solitary. Stout herbs, with 



white llowers and naked or nearly naked umbels. 



21. Cymopterua. Dorsal wings as broad as the lateral ones : oil-tul)es one to several in the 



intervals. Low perennial herbs ; llowers yellow or white ; involucres present. 



++ ++ Lateral wings coherent till maturity ; dorsal ribs iilitbrm ; seed nearly Hat on the lace. 



22. Peucedaiium. Lateral wings thin : oil-tubes Jis long as the fruit. Involucre none. Low 



perennials ; llowers yellow or white, not radiate. 



23. Heracleum. Lateral wings thin : oil-tubos solitary, ilavate, not reaching the base of the 



fruit. Stout pubescent perennials, with white, often radiate flowers. 



24. Ferula. Lateial wings corky, as thick as the fruit ; oil-tubes numerous, mostly obscure. 



in. Umbels regularly compounil. Secondary ribs most prominent, armed with barbed or 

 hookeil pricldes ; oil-tubes solitary under the wings or ribs, consj)icuous. Hispid herbs, 

 wilh while llowers. 



25. Daucu8. Seed" Hat on the face. Biennial or annual. 



20. Caucalis. Seed furrowed on the face or involute. Annuals. 



1. HYDROCOTYLE, Tourn. M.a.k.sii Pennywort. 



Calyx-teeth obsolete. Petals slightly concave, valvate. Fruit flattened laterally, 

 suborbiculur, acutely margined, and with 2 or 3 more or less prominent nerve-like 

 ribs on each sitle ; oil-tubes none ; carpels not separating. — Stuooth herbaceous 

 perennials, growing in or near water, with slender creoi)ing stems ; leaves orbicular- 

 peltate or reniform, with scale-like stipules ; flowers inconspicuous, ai)pearing 

 through the summer, the umbuls simple or proliferous one above the other, on 

 slender peduncles. 



A genus widely dispersed over the globe, of about 70 species, the larger number belonging to 

 the southern hemisplieie ; sparingly represented in the United States. 



1. H. prolifera, Ktliogg. Lcavtis ptiltate, cnmrgiimte at base, simply <;r(!nate, 

 on pctioKis 1 to ;j iuchi's long : peduncles about et|ualling or exceeding tin! leaves : 

 whorls 1 to 4, about 8-ilowered (12-20-llowered, Ketlogg), witli numerous bractlets, 

 the pedicels a line or two long (3 to G lines, Kellogg) : fruit a line broad, slightly 

 emarginate at base ; ribs two on each side, prominent ; commissure narrow. — 

 Proc. Calif. Acad. i. 15. 



A slender species, growing about San Francisco and elsewhere, first collected by C'hamisso ; 

 collected also by Coulter in " Sonora Alta," and by others in Me.xico. It has been referred to 

 //. vuhiaris of the Old World, from which it is distinguished by its nmch longer peduncles and 

 pedicels, the fruit in //. cahjaris being nearly sessile. 



2. H. ranunculoides, Linn. lil. Stouter, usually floating : leaves not peltate, 

 orbicular, with 3 to 7 cienate lobes, on ])etioles 2 to 9 inches long: ijediiiiclcs much 

 shorter than the petioles, ^ to 3 inches long, relk'X(!d in fruit : llowers T) to 10 in a 

 capitate umbel: fruit 1 to 1| lines broad, with thickened scarcely angled margins, 

 rather obscurely 3-nerved on each side, longer than the pedicels. 



About San Francisco ; San Diego Co. {Pahncr) ; and probably elsewhere. Connnon also in the 

 Atlantic States, and from Florida westward tlirougli Me.\ico. 



