374 UMBELLIFER^. (PARSLEY FAMILY.) 



* Involucre of 4-6 hracts. 



1. T. Aiitliriscus, L. © Leaves bipinnatisect into incised- 

 dentate segments, the terminal one of the upper leaves elongated. 

 Rays 5-13 ; petals not radiating ; fruit ovate, .0025 long, .0015 

 broad — Spring — Hills of Gilead and Moab (Tristram). 



* Involucre Oorofl iract. 



2. T, iiifesta, L. © .3 to .6, sparingly divaricate above. Low- 

 er leaves bipinnatisect into ovate or lanceolate, incised-dentate seg- 

 ments, the terminal one of the upper leaves much longer. Umbels long- 

 peduncled, 2-8-rayed ; fruit oblong, .006 long, ,004 broad, including 

 prickles — Spring — Hedges, and waste places ; common. 



Var. occulta, Post. Foliage dense, almost concealing the short- 

 peduncled umbels — Saradah. 



Var. lietcropliylla, Rchb. Upper leaves linear, entire. {T. 

 Jteteroi^liylla^ Guss.) 



3. T. triradiata, Boiss. et Held. Fig. 200. 

 .5 to .8, dichotomous. Lower leaves 



bipinnatisect, segments oblong, parted 

 into short, oblong lobes ; upper leaves 

 with 3-5, oblong to linear, incised-den- 

 tate lobes, or entire. Umbels long-pedun- 

 cled, with 2-S, nearly equal rays; umbellets 

 small, few-flowered, compact ; flowers 

 somewhat radiating ; fruit oblong, .005 

 long, .003 broad, including prickles — 

 Spring — Beirtit. 



Var. tetractis, Post. Umbels 

 frequently 4-rayed — Es-Salt (Gilead). Fruiting umbel of T. 



triradiata. 



4. T. ncg^lecta, Rosm. et Sch. © .5 to 1, divaricately branch- 

 ed. Leaves bipinnatisect, segments rather large, oblong, incised-den- 

 tate ; the upper leaves gradually diminishing. Umbels long-pedun- 

 cled ; rays 2-12 ; flowers radiating ; fruit .005 long and broad, with 

 both mericarps densely prickly, or with one mericarp prickly and the 

 other tubercled — Spring — Fields and neglected places ; common. 



5. T. nodo§a, L. © .3 to .5, stems decumbent, more or less zig- 

 zag, divaricately branched. Leaves bipinnatisect into oblong-ovate, 

 incised-dentate to pinnatipartite segments. Umbels sessile or short-pe- 

 duncled, ohsoletely 2-d-rayed, clustered; flowers minute, not radiating ; 

 fruit .003 long and broad, including prickles, nearly sessile, the inner 

 mericarp ojten p)apillose — Spring — Dry fields and roadsides; common. 



69. CAUCALIS, Hoffm. Caucalis. 



Calyx 5-toothed. Fruit somewhat laterally compressed. Primary 

 ribs 5, filiform, bristly ; secondary 4, more prominent, with 1-3 rows 

 of prickles. Oil-tube 1 under each secondary rib. Inner face of albu- 

 men involute — Annual, white-flowered herbs ; involucre 0, or of one 

 bract. 



