Dicotyls or Exogenous Plants. 87 



d. Leaflets pinnatifid ; plant decumbent or assurgent : fruit 



narrowly oblong', glabrous Chcerophyllniii. fi 



d. Leaflets variously toothed ; plant l-o ft. high ; fruit linear or 



linear-oblong, attenuate at base, with bristly ribs Osniorrhiza. 7 



d. Plants low, nearly acaulescent, flowers few ; fruit nearly orbicular (e^ . 



e. Plants 1-3 ft. high, flowers yellow Zizia. 8 



e. Plants nearly acaulescent, flowers few, white Erigcnia. 11 



1. Genus AN -GEL'- 1 -CA.— Calyx-teeth obsolete; fruit flattened 

 dorsally, having a double-winged margin ; leaves ternately or pfn- 

 nately compound ; umbels large; flowers white or greenish. 



An-gel'-i-ca at-ro-pur-pu'-re-a L. Angelica. — Stem dark-purple ; leaf- 

 lets 1-1 V2 in. broad, sharply mucronate-serrate. 



2. Genus HER-A-CLE'-UM.— Calyx-teeth minute ; fruit broadly-oval 

 ■orobovate, leaves ternately compound ; umbels broad; flowers white; 

 petals obcordate, the outer ones commonly larger and '2-cleft. 



Her-a-cle'-um la-na'-tum Mx. Cow Parsnip. — Woolly stem, 4-8 ft. 

 liigh ; leaflets broad. 



3. Genus THAS'-PI-UM. — Calyx-teeth conspicuous ; fruit ovoid to 

 oblong; stems ^l-'^ ft. high; leaves ternately-divided (or the lower 

 simple) ; flowers yellow. 



Thas'-pi-um tri-fo-li-a'-tum au' re-urn (Xutt.) Britt. (77/. aureum var. 

 irifoliatum Coult. & Rose.) Meadow Parsnip. — Glabrous; root-leaves 

 mostly cordate, serrate or crenately toothed, stem leaves simply ternate 

 (or rarely biternate) ; flowers deep yellow. 



Thas'-pi-um bar-bi-no'-de (Mx.) Nutt. Meadow Parsnip. — Pubescent 

 on the joints; leaves 1-o-ternate ; flowers light yellow. 



Thas'-pi-um bar-bi-no'-de an-gus-ti-fo'-li-um Coult. & Rose. Meadow 

 Parsnip. — Like the last but narrower and more sharply cut leaflets, 

 and fruit more or less puberulent. 



4. Genus SA-NIC'-U-LA. — Calyx-teeth manifest; fruit thickly 

 clothed with hooked prickles; leaves palmately-lobed or parted; 

 flowers greenish or yellowish. 



Sa-nic-u-la mar-y-lan -di-ca L. Sanicle; Black Snake-rpot. — Sterile 

 flowers many and long pedicelled; the styles longer than the prickles. 



