92 PROCEEDINGS OF THE AMERICAN ACADEMY 



TONELLA Nutt. There are two well-marked species. Although 

 the character of solitary ovules, assigned iu Proc. Am. Acad. 7, 

 p. 378, holds iu only one of them, yet the form of the corolla — with 

 rotately expanding lobes and the lower one open, not at all enclos- 

 ing the stamens and style — appears to mark the genus as a good 

 one. Moreover, the middle leaves are almost all 3-parted or divided. 

 The species are : — 



1. C. BicoLOR Benth. Calycis lobis acutis ; corollas bicoloris nunc albae 

 fauce ventricosa valde obliqua, labio superiore quam inferius parum breviore. 



— C. heteropliylla Graham, Bot. Mag. t. 8695, foliis imis trifidis. — Chiefly in the 

 western part of California. 



2. C. TiNCTORiA Hartweg in Benth. PI. Hartw. Viscidior ; pedioellis brevi- 

 oribus vix uUis ; calycis lobis linearibus vel angusto-oblongis sajpius obtusis ; 

 corollae (ochroleucce, nunc albaj nunc purpureo notats) fauce ventricosissinia 

 transversa, labio superiore brevissimo, lobis lateralibus intus parce barbatis. 



— C. burhata Bosse in Bot. Zeit. 12, p. 905 (1853). C. se/jlevmervla Kellogg 

 in Proc. Calif. Acad. 2, p. 224, fig. G9. — Mainly in and towards the Sierra 

 Nevada. 



* * Corolla minus declinata, fauce gibbosa obliqua longiore quam lata : caules 

 humiliores : folia plerumque crenato-dentata, crassiuscula, obtusa. 



H- Filamenta pi. m. barbata : labium superius corollae (sub lobis parum callo- 

 sum) baud cristatura : calycis lobi latiores obtusi. 



3. C. BARTSiiEFOLiA Beutli. in DC. Puberula, subglandulosa, vel superne 

 viscidulo-hirsuta, erecta ; verticillis florum 2-5; corollae labio superiore fauci 

 obliquo asquilongo, lobis lateralibus emarginatis vel obcordatis ; glandula sessili 

 elongata porrecta. — C. bicolor var. ? parvijiora Benth. PI. Ilartw. No. 1884. 

 C. hirsula Kellogg, 1. c. p. 110, fig 84, forma liirsutior. The low transverse 

 callosity at the junction of the limb of the upper lip of the corolla with the 

 throat, which is visible in several species, is more evident in this ; it borders a 

 small hood-like depression. 



4. C. CORYMBOSA Herdor, Ind. Sem. Petrop. 1867, & Gartenfl. 1868, t. 668. 

 Glabra vel subpuberula, decumbens ; foliis carnosulis latioribus ; floribus in 

 capitulum unicum congestis ; corolla bicolore rectiuscula, labio superiore brevis- 

 einio, lobis fere obsoletis ; glandula parva complanata stipitata. — Coast of the 

 northern part of California. 



H- -I- Filamenta glabra : corollae labium superius sub lobis fornicato-cristatum : 

 calycis lobi angustiores acutiusculi ; flores parvuli violacei. 



5. C. Greenei Gray, Proc. Am. Acad. 10, p. 75. — Lake Count}', California, 

 E. L. Greene. 



§ 2. LaxiJlorcE, pcdicellis elongatis aut solitariis aut aunbellato-verticillatis. 



* Glabrae : folia inferiora saltem radicalia rotunda vel oblonga, pi. m. dcntata : 

 calycis lobi acuti, fructiferi capsulam superantes. 



