STUDIES IN CEANOTHUS. 209 



(floribus albis). Hills and sandy plains, Cajon Pass, March 16; Teyung, 

 California, Mr. Wallace 1854. Dr. Parry discovered this well-marked 

 species in the mountains south of Los Angeles, while acting as botanist, 

 under Major Emory, in the Mexican boundary survey. — Pac. K. Kep. iv, 

 75 (1857). Mex. Bound. Survey, ii, 46, pi. 11 (1859). 



While typical C. crassifolitis, such as Nos. 84 and 85, 

 appears quite distinct from any form of C . rigidns, the 

 forms found growing together at South Side bring them 

 ver}' near together. No. 83, South Side (Soledad Canon), 

 Los Angeles Count}-; No. 84, Foster's, San Diego Coun- 

 ty; No. 85, Newhall, Los Angeles County; No. 87, 

 Summit of Santa Ynez Mountains, Santa Barbara. 



21. Ceanothus prostratus Benth. 



Ceanothus prostratus sp. n.: fruticosus, prostratus, glaber, resinosus, 

 foliis oppositis cuneatis apice spinuloso-tridentatis coriaceis obscure pen- 

 ninervibus, thyrsis brevibus sub-umbelliformibus. — Fruciculus ramosis- 

 simus, rigidus, in terram prostratus. Eami et folia omnia opposita. 

 Eamuli juniores subangalati, demum teretes. Stipulaa anguste, lanceolat^e 

 acutii?, fuscas, liuea breviores. Folia 6-9 liu. longa, basi in petiolum bre- 

 vem angustata, versus apicem divisa in dentes seu lobos 3 spiuescenti- 

 triangulares quorum intermedins vulgo latior, cfeterum integerrima, 

 crasso-coriacea. VenaB laterales in folio juniore iis C. ouneati similes sed 

 in adultiore vix conspicure sunt, et pagina inferior etsi pallida vix canes- 

 cit. Ramuli floriferi 1 — 1^ pollicares, basi raro instructi foliorum pari 

 ramealibus conformium, sepius aphjdli, folia nempe floralia cum stipulis 

 coucreta, et miitata in bracteas orbiculatas coucavas membranaceas deci- 

 duas 1 i-2 liu. longas. Nodi floriferi dilatati, in quoque ramulo 1-2 quorum 

 ultimos pedicellos emittit circa 6 graciles, 4-6 lin. longos, et inferior pedi- 

 cellos similes 2 v 3. Earius pars florifera ramuli elongatur et nodos pr»bet 

 tloriferos plurimos approximatos prucifloros. Flores cferulei magnitudine 

 C. cuneati. Ovarium glandulis 3 elevatis coronatum. — In montibus Sacra- 

 mento.— Benth. in Plantfe Hartwegiana?, 302, (1848). 



This does not well describe the species as it occurs in 

 the higher elevations from Washington to Central Califor- 

 nia but applies much better to some of its hybrids with 

 C. cimeatits, such for instance as the one described as C. 

 connivens Greene. The leaves in the forms from north- 

 ern and elevated regions, which must be taken as repre- 

 senting the species, are 5-9-toothed. The fruit in all the 



2d Ser., Vol. IV. ( U ) June 2, 1894, 



