2SG 



The only genus in Callitrichaceae. Oenn APIFM Tim 



CALLITRICHE MARGIXATA Torrey. 



Usually rt'ing- in the mud, sm, with Ann or P er glabrous herbs with pin- 



linear-oblanceolate Ivs, 4-6 mm long- or nate or pmnately compound Ivs and w 



less, sometimes floating- with slender sts or & lsn y fls in compound umbels: cx- 



and the upper Ivs spatulate; stys elon- teeth obsolete: stylopodium depressed 



gated, reflexed, decid: fr on slender or short-conic: fr ovate or broader than 



spreading pedicels, 2-8 mm long, deeply lon - smooth or tuberculate: carpels 



emarginate above and below, the mar- mostly with prominent ribs, somewhat 



gins of the thick carpels widely diverg- o-angled: oil-tubes mostly solitary in 



ent. narrowly winged. tne intervals, 2 on the commissural 



Davidson, PI LA Co 6. side: sd terete or nearly so. 



Soldiers' Home (Hasse). Xear SD in APIUM GRAVEOLEXS Linn. 



shallow pools on the mesa. Glabrous: sts erect, 3-9 dm hi, sev- 



Abrams. Fl LA 237. eral leafed: Ivs pinnate, basal and lower 



Peculiar to the Pacific coast, from Ari- ones long-petioled, the upper short-pe- 



zona to California. Also attributed to tioled or nearly sessile, thin, broadly 



Chili. ovate to oval, coarsely toothed and 



CALLITRICHE VERXA Linn. often incised, 1-3 cm long; umbels op- 



Per, with elongated sts and floating posite the Ivs and terminal, 3-7-rayed; 



rosulate obovate often emarginate Ivs, * nv and involucels sm or 0: fls minute, 



which are more or less narrowly peti- w - very short-pedicelled; fr oval, scarce- 



. oled, the submerged ones from spatu- *y ! mm long, the ribs somewhat 



late to. linear; sometimes terrestrial and "winged. 



rooting, with short linear Ivs: bracts Davidson, Erythea 1:59, LA Co. 



often exceeding the fr. rarely 0: sty ' Parish, Zoe 1:9 (claims it is indigen- 



erect or spreading, usually shorter than ous). 



fr, decid: fr orbicular or slightly obcor- Abrams, Fl LA 284. 



date or more usually elliptical, nearly Wild celery; Europe, widely naturalized 



long, emarginate. and with acute Genus BERULA Hofflm 



verged marns >" ^^ Slightly d1 ' Glabrous marsh per wiS pinnate Ivs 



Canada: nearly 'all parts of the United and serrate Ifts: fls w in terminal corn- 



States: South America 5 ; Europe and Asia. P^ ets ne*ual, >"*. ?* 



CEBATOPHYLLACEAE. passing the fls: fr subglobose, 



T v? crowdpri in vpTnnii<? lin^nv nr glabrous, surrounded by a continuous 



filiform ipfrulose-slrrula^ forked corkv covering of confluent rib: oil- 



stem and piStniatl fls "enerallv at dif ' tubes num and contiguous, in the ma- 



fe?St an n d od P es sU* ^of^anU ^bout S re n fr , more tb or ^ ess ''"fluent, closely 



equaling perianth: ova and' fr slightlv SrBrS^fiJSTwS! 1 ^ K * 



pxrppflino- rhp <;pn fr hoak-^rl TtritvT tVila -bt^KLLA A.NGL STIFOLIA Koch. 



Throughout the U. S.; Mexico; Europe. 



Genus CERATOPHYLLtM Linnaeus. BEBijL^EBECTA Coville 



-CERATOPHYLLUM DEMERSUM Linn. Erect, 1.5-9 dm hi; Ifts 5-9 pairs, lin- 



Sts 2-'J dm long. Ivs 2-3-times forked, ear to oblong, or ovate; serrate to cut- 



end of the seg capillary and rigid, 8-25 toothed, often laciniate-lobed, some- 



mm long, fr oval. 4-6 mm long, smooth times crenate. 1-7.5 cm long; umbels 



or tuberculate, sometimes winged or many-rayed: rays 5 cm long or less; 



with 2 basal spurs on each side. bracts usually conspicuous; bractlets 



ams. Fl LA 151. narrow; pedicels 4-6 mm long; fr 



Davidson, PI LA Co 16. scarcely 2 mm long. 



Geuu. APIASTRL-M Xa.ta... ^u^W^Hu^: 



Very slender smooth branching ann, Sium angustifolium L. 



with finely dissected Ivs having filiform Berula angustifolia Koch. 



linear seg. and sm w fls in naked Water Parsnip. LA (Xevin), north. 



unequally few-rayed umbels: ex-teeth Davidson, PI LA Co 7 



obsolete: fr ovate or cordate, with ob- -, .-.- 



scure or obsolete ribs, more or less tu- Uenus MAI/VA Linnaeus. 



berculate: carpel with thin pericarp: Pubescent or glabrate herbs with den- 



stylopodium minute, depressed; styles tate lobed or dissected Ivs, and axy or 



short: oil-tubes solitary in the inter- terminal solitary or clustered fls: ex 5- 



vals and beneath the ribs. 2 on the cleft: bractlets of the inv 3, rarely 0: 



commissural side: scl-face narrowly con- pet 5: ova many-celled; cells 1-ovuled, 



cave or sulcate. sty-branches equal in. number, linear, 



APIAStRUM AXGUSTIFOLIUM Nutt. stigmatic along the inner side: carpels 



Slender, 0.5-3 dm hi, usually much arranged in a circle, beakless, indehis- 



branched: Ivs 2.5-5 cm long, biternately cent, 1-seeded. Mallow; fr known as 



or triternately divided, with linear or cheeses among children. 



nearly filiform seg: umbels sessile: rays MALVA PARVIFLORA Linn. 



frcm 2.5 cm Ions: to 0: pedicels 12 mm Bloch, Efythea 2:163, note on medi- 



long or 0: fr with narrow commissure, cinal use. 



cordate in outline. 1 mm long. Sm fld Malva: widely branching. 1-6 



Abrams. Fl LA _ hi; petioles and ascending branches 



Brandegee, Zoe 1:114, Cat. stellate-hairy on the upper side, gla- 



Mendocino Co to Quintin; Cruz. brous below; Ivs roundish in outline, 



