PARKINSONIA 



Jlexico as jmlo venle, from the bright given color of 

 branches. It stands drought even better than P. c 

 Irata. These plants belong to the same tribe with s 

 Hue northern trees as Gleditschia and Gymnocladus 

 such southern kinds as Csesalpinia, Poinciana 

 Colvillea. 



A. Lfts. numerous: rachis flat, long. 

 acule4ta, Linn. Jerusalem Thorn. Small, glabi 

 tree, the slender branches often pendulous: spiny \ 

 oles %-l in. long: lfts. very small, oblong; ra. 

 %-VA ft. long: racemes axillary, 3-6 in. long: fls. 

 grant, pendulous. S.S. 3:131. 



AA. Lfts. few: rachis terete. 



PARONYCHIA 



1217 



Torrey4na, 



Riidimentar 



its. Small tree: lfts. 2 or 3 pairs: ra- 

 ag the branches: pedicels jointed near 

 tlif middle, the joint not evident until in fr. Valley of 

 the (Jolo. and eastward. p. Francesohi and W. M. 



PABNASSIA (after Mt. Parnassus). SaxifragAcew. 

 (Jkass of Paknassus. About a dozen species of low- 

 growing, moisture-loving, hardy perennial herbs, of 

 tufted habit, each scape bearing a solitary, 5-petaled, 

 white or yellowish flower %-lii in. across. They are 

 suitable for shady positions along the water's eiljjf. ;aid 

 are prop, by seeds or division. Thiy l n lii: , ^r w 

 about 6 in. high, but attain 2 ft. They 1 ' i i 



to September; the petals are conspicui Ml i i 



or more green lines. The plant which l)i. .,,,,, ,| 



"Grass of Parnassus" is P. paliistri^. lii^ wi.i;, .>|.. » i. .^ 

 that is common in Europe. This is perhap.-. the bust 

 one for cult., but they are all much alike. Parnassias 

 !vre suitable plants for moist, sunny or partially shaded 

 positions. They prefer a peaty soil, but such is not 

 necessary. The species are generally tenacious of lite 

 and are good perennials. The North Carolinian species 

 are hardy North. 



Parnassias are natives of the north temperate and 

 arctic zones. Calyx 5-parted : petals withering, but 

 persistent: fertile 'stamens 5, alternating with the pet- 

 als: ovary 1-celled; style very short or none: stigmas 

 usually 4 : ovules many : capsule 1-celled, with 4 pla- 

 centee projecting within, 4-valved. 



A. Petals not clawed. 

 I stamens 9-ZO at the base of each 

 petal. 



c. Scape-leaf clasping. 

 palustris, Linn. Grass op Parnassus. Lvs. ovate, 

 usually cordate at the base: fls. '/i-l in. across: rudi- 

 mentarv stamens 9-15 at the base of each petal. Eu., 

 Asia., -X. Amer. Gn. 41, p. .lOO. A.G. I.i:6n6.-ln Eu. 

 considered the commonest and best species, but in this 

 country it seems to be advertised only by dealers in 

 Japanese plants. 



cc. Scape-leaf not clasping. 

 Califdmica, Greene. Height 1-2 ft.: lvs. ovate or 

 ovate-oblong, 1-2 in. long; scape-leaf very small, and 

 borne much above the middle: fls. IK in. across; rudi- 

 mentary stamens about 20 at the base of each petal. 

 Calif. Int. laOO, by Horsford. 



im. Etidinienlary stamens SS at the base of each 

 petal. 



Caroliniina, Michx. Height 8-16 in.: lvs. ovate, 

 bioadly oval or orbicular, more or less cordate at the 

 base; scapc-k-af borne below the middle: fls. J^-lJ^in. 

 across ; ruiiinu-ntarv stamens usually 3 in eacli set. 

 Swamps and low meadows. New Brunswick to Manitoba, 

 south Va. to la. B.B. 2:182. B.M. 1459. -Co 



AA. Petals clawed. 

 u. Eudimentary stamens 3 at the base of each pctnl. 

 asarifdiia. Vent. Height 10-16 in.: lvs. orbicular, 

 kidney-shaped at the base, often 2-3 in. wide; scape- 

 leaf clasping, borne at about the middle: petals' not 

 fringed. Wet places in high mts. of Va. and N. C. 

 B.B. 2:184. 



BB. Riidimenturij stamens 3-<J at the base of each 

 petal. 



fimbri&ta, Banks. Lvs. kidney-shaped to cordate- 

 ovate: petals fringed below the middle. Colo, to Calif, 

 and Brit. X. Am.-r. Int. bv Gillitt in 18SI, and still 

 cult. 



lustris. I., - . , ,; :... iJiukUe: 



iS'el: n^lhn^mayyHhunenis :i! i!i^t't<M.lH-d'lly'an^ 



layas. B.M. GGOO. P. 'W. Barclay and 'W. M. 



PAKNASSUS, GKASS OF. See Parnassia. 



PAROCHfiTUS (Greek, near a lake). Legumindsce. 

 This plant was offered recently by A. Blanc, of Phila- 

 delphia, under tlie name of Sliamru.'k Vvj. or Blue 



pink will'-'". Ii I ■.■ • ' II 'I' ill- i..i.,l.i ir,, pots 



and 1 kill.- l: ; ■ . <, -> car round. It 



is a nat I ■ ;i , , . .\ frica, ascend- 

 ing till- ! I ,': ■:. , . . , I I • .11 i,-<-t. If seeds 



could I" -'■■,!■ A ir.iiii III. III. 111. -1 .-iliiiuile the plants 



r.ijiK-li- tii^ is a genus of one species. It is allied to 



il i"M r-. -wi-et clover, medick and re.st-harrow, and 



ililliis friuii tbem in having a more acute keel, a 2 

 valved pod. and the lfts. not stalked. 



commftnis, Hamilt. Shamrock Pea. Blue Oxalis. 

 Height 2-3 in.: rhizome thread-like, wide-creeping: 

 petiole 2 in. long: lfts. obovate. emarginate, glabrous 

 or slightly pubescent: peduncles 1-2-fld. : fls. K-54 in. 

 across, axillary. F S. 15:1575. 



PARON'J-CHIA (old Gre..-k na 

 meaning whitlow-wort, nr n r 



iigers 



Wm 



Britton and Brown retii 

 40 species of annual or | 

 Mediterranean rr-sinn. ' 

 mously branehiTiL': l^ -. 

 tire, the margins ihit .n 

 prominent, scarimis, s]i n 

 a.xillary or rarely in |. 

 clustered and bidden ai 

 cult, in the hardy bordi 

 used in bedding. The tw 

 do not appear in the li 

 foreign, but P. x, rin,li;f,, 

 carpet bedding aluoinl. 



for generic ditYn. i ~. 



are perennials. /'.-//;/' 

 of medicine. 



■ Dioscorides, 



i-1,1 .■ lit the 



..r; by 



,\liout 



nl the 



1. .. .hrliotO- 



A fe 



sely 



1 to be much 

 es here given 

 , domestic or 

 iiuch used for 

 ria, which see 

 cribed below 

 ■ Algerian tea 



A. Lis. rather broad, obovate or nearli/ so. 

 B. Foliage near.y glabrous. 



arg6ntea. Lam. Prostrate, dififuse: lvs. obovate to 

 oblong or lanceolate: fls. lateral and terminal, dense, 

 intermi.\ed with lvs.: bracts ovate, acute, much longer 

 than the fl.; calyx-lobes serai-scarious, hooded, muoro- 

 nate on the back near the apex. Common in dry places, 

 Mediterranean region. 



BB. Foliage ciliate at the margin. 



serpyllifdlia, DC. Prostrate, creeping: lvs. obovate, 

 flat, rather fleshy: fls. terminal; calyx -lobes blunt. 

 .\rid parts of southern and eastern Eu. 



AA. Lvs . narroit , linear or awl-shapcd. 

 B. Aa'ns of the calyx-segments erect. 



argyr6coma, Nutt. Erect or ascending, 3-8 in. high, 

 elotlu-il with silvery, appressed, scale-like hairs : lvs. 

 linear; stipules silvery wliite. s.-arious. entire, usually 



shorter th:m the lvs. : lis. in ir.ri.in _ . -. im s: bracts large, 

 silvery, membranous. K'... i i i ■ >l.. ami N. II. to 

 Ga. and Tenn. Al.soc.ill I m i ' i kwecd. Silver- 

 head, and Silver Whitlow V, 1 II . i; I; j:::,s. 



