UMBELLIFERiE. 329 



white or yellow. Calyx-teeth obsolete or manifest. Fruit strongly 

 flattened dorsally, obloug to suborbicular, glabrous or tomentose; carpel 

 with dorsal and intermediate ribs filiform and approximate, the lateral 

 ones developed into a broad thin wing which until maturity is coherent 

 with that of its companion carpel, forming a broad scarious wing to the 

 fruit as a whole. Oil-tubes 1 — 8 in the intervals, 2—10 on the commis- 

 sural side. Seed flat, with plane or concave face. 



* Stout; leaves finely dissected; fruit- wings broad; oil-tubes 1 — Sin 

 the intervals; Jl. white (purplish in n. 4)- 



1. P. eurycarpum, C. & R. Rev. Umb. 61 (1888): P. macrocarpiDn, 

 var. eurycarpum, Gray, Proc. Am. Acad. viii. 385 (1870). Root tuberous- 

 enlarged: stem 1 — 2 ft. high, branching, pubescent: leaves subdivided 

 into countless small linear cuspidate segments: umbel 3— 12-rayed, with 

 involucels of lanceolate acuminate often united bractlets; rays }4 — ^ i^^- 

 long; pedicels 1 — 5 lines: fr. glabrous, 5 — 9 lines long, broadly elliptical, 

 the wings as broad as the body or broader, the ribs filiform; oil-tubes 

 large, solitary in the intervals, 2 on the face. — Plains and hills of the 

 interior, from the Sacramento northward. 



2. P. dasycarpum, T. & G. Fl. i. 628 (1840): P. Pringlei, G. & R. Bot. 

 Gaz. xiii. 209 (1888). Subacaulescent from a fiisiform root, tomentose- 

 pubescent: leaves rather small, with countless short linear segments: 

 peduncles stout. % ~1 ft. high; umbel 6 — 12-rayed, with involucels of 

 linear-lanceolate more or less tomentose bractlets; rays 1 — 3 in., pedicels 

 3 — 5 lines long: fr. nearly orbicular, 4—7 lines long, nearly glabrous or 

 coarsely pubescent, the thin scarious wings broader than the body : oil- 

 tubes large, usually solitary in the intervals, 4 on the face: seed deeply 

 silicate under the oil-tubes, plane on the face. — In the interior almost 

 throughout the State. 



3. P. toineiitosuiii, Benth. PI. Hartw. 312 (1849). Subacaulescent, 

 more or less densely villous-tomeutose and purplish: leaves cut into 

 very small filiform or very narrow segments: peduncles 1 ft. high or 

 more: umbel of 4 — 8 equal rays 1 — 3 in. long; involucels of linear- 

 lanceolate or ovate-acuminate bractlets : calyx-teeth manifest : f r. ovate to 

 orbicular, 5 — 9 lines long, densely tomentose; wings rather thick, from 

 somewhat narrower to even broader than the body, the prominent ribs 

 concealed by the tomentum: oil-tubes mostly 3 in the intervals, 4 on the 

 face: seed somewhat concave. — Common on bushy hills and open plains. 



4. P. Austinae, C. & R. Bot. Gaz. xiii. 208 (1888). Acaulescent, less 

 than a foot high, apparently glabrous (minutely and sparsely scabrous 

 under a lens): leaf -segments ovate, pinnately lobed or incised: umbel 

 few-rayed, with small involucels: fl. white, or with a tinge of flesh-color: 

 fr. elliptical, 3— 4 lines long; wings not as broad as the body; oil-tubes 



