Lnphamia. COMPOSITE. 319 



134. LAPHAMIA, Gray. (Dr. Increase Allen Lapham. of ^iscoBsin, 

 died in ls7.j.) — Low fuiJruticulose perennials. Texano-Arizonian. -rowinij in 

 crevice- of rocks, mostly with petioled and dentate or laciniate small leaves." the 

 upper alternate, rarely all opposite : small heads of yellow (rarely white ?) flow- 

 ers, either cymosely disponed or singly terminating the branches : fl. sprino- and 

 summer. — PI. Wright, i. 'J'J. t. 9 ; Benth. lV Ilnok. Gen. ii. O'js. excl. ^pec. 



L. PESiNSUL.^Ris, Greene, Boll. Calif. Acad. i. s, is an extra-limital species (^vith rather 

 large and radiate heads and no pappus) from Lower California. 



§ 1. Pappothrix, Gray, 1. c. Pappus of about 20 unequal ri-id hispidnlous 

 bristles, hardly as long as the somewhat quadrangular-<?ompressed akene. shorter 

 than the corolla : rays none: di^k-flowers 12 to 1.3 ; the corolla with short proper 

 tube and cylindraceous throat : bracts of the involucre 5 to ■'<. linear-ijlilonCT. nearly 

 plane : stems slender, a span or more high and much branched from the stout 

 woody base : leaves mostly opposite, as broad as loug. abruptly slender-] letioled : 

 short-peduncled heads rather scattered. 



L. rupestris, GR.iV, 1. c. Pnliesceut, slightly viseid, leafy to summit: leaves (half-inch 

 long) :^'lnle^iIn^?s crenately S'liiR-timc'S sti-i'nirly and acuiirly dentate or almt^st laciniate: 

 pappus much exceeding short proper tnbe "f the coroUa. — ^. TT. Texas, WrUjht, Biyeloic. 



L. cinerea. Gray. Tomentose-canescent : leaves more orbicnlar, almost entire: pajiTius 

 hardly surpas-ing the proper tulie of the coroUa, which is more than half the lecirth of the 

 short-cylindraceons throat: akenes sometimes 4-nerved. — Bot. ilex. Bound. Si. — Koeks 

 along Eftondido Creek, S. T\'. Texas, Bi'jiAow. 



§ 2. Lapha5IIA proper. Gray, 1. c. Pappus of a solitary very slender bristle 

 (very rarely a pair from the same angle), or none : akenes flatter : disk-flowers 

 15 to 2u : their corollas with longer and glandular tube. — JLjuotlirix. Torr. in 

 Stansb. Exped. O'^O. t. 7. 



* Involucre 1 .5-2i^floweTed, of nearly as many plane and linear pubescent bracts : leaves nearly 

 orbicular in outline, palmately lubed or dissected, not punctate, the lower opposite. 



L. TiB rnm nni, Geav. Depre-sel and diffuse, ranch branched, hardly a span high, viUrsely 

 pubescent, leafy throughont : leaves a quarter or third of an inch in diameter and with 

 petiole of equal length, obtusely 3-lobed and the lobes coarsely crenate-dentate : heads (3 or 

 4 lines long) short-peduncled . rays none: akenes canescently pubemlent : j^appus a very 

 delicate bristle, or occasionally a pair from the same angle, little ^urIlassing the proper tube 

 of the coroUa, or often none. — Proc. Am. Acad. xvi. 191.^ — Southern Arizona, near Camp 

 Lowell, Lemmon. 



Var. pedata, Geat, 1. c. Leaves pedately parted and cut into narron- lobes. — T\'ith 

 the other form, also on the Chiricahua Moimtains, L'-mmon. 



* * Involucre 15-2.5-flowered, rather narrow, gl.ibrous. of thinnish nearly plane bracts, 2 or -3 

 lines lon^: herbage merely pubendent: leaves mostly angulate-toothed or incised, the lower 

 opposite : heads commonly corymbosely cyiuose and pedunculate. 



L. lialiinif olia, Grat. Stems a span or more high and crowded on a thick woody caudex : 

 leaves coriaceous, resinous-punctate or atomiferous, somewhat viscid, broadly ovate or rhom- 

 bic, seldom inch long, laciniately dentate, abruptly long-petioled: rays 4 to 6, with broad and 

 short ligules little longer than the tube: pappus none. — PL Wright. I.e. 99, t. 9. — S. W. 

 Texas, Wright, Bigelow. 



L. angTlstifolia, Gray. Leaves lanceolate or rhombic-lanceolate, tapering into margined 

 petioles, laciniately 1-5-toothed or lobed: heads less numerous, scattered : rays none: other- 

 wise much like the preceding species. — PI. Wright. 1, c. & ii. SI . — S. W. Texas, on high 

 and rockv hills of the Pecos, Wright, Harard, the latter's specimens coimecting- with var. 

 lacinlata, Grav. Bot. ilex. Bound. S2, which proves to be only a form with long and weak 

 stems, hanging from rocks on the Eio Grande, Birjeloic, c^tlvjtt. 



