PARSLEY FAMILY 635 



Systematic note.- — Correlated series of juvenile, flowering and fruiting specimens are a 

 necessary desideratum for research on "West American Lomatia, — necessary because such mate- 

 rial must underlie any sound evaluation of specific units and any real understanding of geographic 

 distribution. Of many species material is on the whole scanty, such as Lomatium austinae, L. 

 plummerae, L. ciliolatum and L. rigidum. Some species simulate curiously species of other genera. 

 Mainly by reason of lack of sufficient stages suitable for determination, specimens of such species 

 are often found in wrong genus covers in herbaria. Lomatium torreyi resembles Cymopterua 

 terebinthinus in habit and foliage, L. parryi simulates closely Cymopterus anisatus of Nevada in 

 habit and foliage, L. piperi resembles Orogenia linearifolia of Oregon in its tubers, in habit and 

 in foliage, and L. rigidum recalls vividly Cymopterus panamintensis (L. rigidum "is a Cymopterua 

 panamintensis in everything but the fruit and another very interesting link between these closely 

 related genera" — M. E. Jones, Contrib. W. Bot. 13:11). The life histories of L. congdonii, L. 

 alatum, L. marginatum are all too slightly known. 



I. Stems from a taproot. 



A. Peduncles not enlarged at summit. 



a. Fruit notched more or less deeply at each end, so that the wings on each side the body are more 



or less distinct; leaves with the leaflets more or less broad in 



outline. — Subgenus Euryptera. 



Leaves ternate, the leaflets entire or merely toothed. 



Oil-tubes solitary in the intervals ; wings of fruits twice as broad as body ; coastal S. Cal. ; 



Vaca Mts 1. L. lucidum. 



Oil-tubes 3 in the intervals; wings of fruits slightly narrower than body; Del Norte Co 



2. L. howellii. 

 Leaves bipinnate, the leaflets ovate in outline, but usually much incised. 



Oil-tubes solitary in the intervals ; South Coast Eanges 3. L. parvifolium. 



Oil-tubes 3 in the intervals; Inyo Co 4. L. rigidum. 



b. Fruit not notched or scarcely so, the wings more or less joined above and below 



the body of the seed. 



Leaves decompound, dissected into numerous very small segments. 



Leaves ternate or quinate, broad or roundish in outline. — Subgenus Eulomatium. 

 Bractlets present. 



Bractlets broad, roundish or obovate ; leaves ternate, then pinnately dissected ; 

 flowers yellow; widely distributed species. 

 Oil-tubes none in the intervals or indistinct ; wings of fruit narrower than body, 



thickish 5. L. caruifolium. 



Oil-tubes solitary in the intervals ; wings of fruit thin. 



Wings broader than body; body situated mostly above middle of fruit 



6. L. vaseyi. 

 Wings equaling the body in breadth or narrower than body ; body situated 



about middle of fruit 7. L. utriculatum. 



Bractlets narrow, most often lanceolate. 



Bractlets not scarious-margined (sometimes inconspicuously so), often more or 

 less united and unilateral. 

 Fruit glabrous (rarely puberulent when young, becoming glabrate, espe- 

 cially on the wings) ; corolla glabrous; widely distributed species. 



8. L. inacrocarpum. 

 Fruit pubescent ; corolla with kinky white hairs. 



Pedicels mostly % inch or more long ; wings of the fruit broad, mem- 

 branous, thinly pubescent ; Coast Eanges.. ..9. L. dasycarpum. 

 Pedicels mostly less than i/^ inch long; wings of the fruit narrower, 

 somewhat thickened, tomentose. 

 Fruit large (6 to 8% lines long), elliptic, the wings about as 

 broad as the body ; body broadly ovate, densely tomen- 

 tose; Great Valley and Sierra foothills 



10. L. tomentosum. 



Fruit smaller (3 to 4i/^ lines long), broadly elliptic to orbicular, 



the wings narrower than the body ; body oblong-elliptic, 



the intervals very dark and the ribs white-hairy ; interior 



deserts and bounding ranges 11. L. mohavense. 



Bractlets conspicuously scarious-margined. 



Herbage glabrous save the ciliolate leaf -margins 12. L. ciliolatum. 



Herbage pubescent or puberulent ; mostly summits and slopes towards the 

 desert interior. 



