398 POLEMONIACEAE (PHLOX FAMILY) 



limb of short obtuse lobes. Stamens unequal and unequally inserted o^ the 

 tube of the corolla. Capsule narrowed at base. Seeds usually 1 in, each cell, 

 mucilaginous when wetted, and emitting spiracles. ' 



Flowers in terminal clusters . , , 1. C. litaearis. 



Flowers sblitary' in the uppermost axils • • • » . .' • 2. C. tenella, 



li, CoUomia linearis Nutt. Gen. 1: ,126. ISIS; ., Stems simple or brahphing 

 above, sometimes in age widely so,, 1^3 dm. high: flowers capitate-crpyded 

 and leafy-bracted: caljrs obconical; the lobes triangular-lapceolate: corqlla 

 from Klao-purple to nearly white, very slender, tubular-funnelform, tjie tjibfi 

 minutely pubescent: capsule triangular-oboordate. — Very common in moist 

 sandy soUs in our range. , ■ / • 



2. Collomia tenella Gray, Proo. Am. Acad. ,8: 259. ,J.870. Viscid-puberu- 

 lent, very islendery 5-12 cm. high, simple or laxly branched above; leave? 

 entire> lineal*,! obtuse, attenuate at base, the lowest opposite: flowers_soli1;ary 

 in the axils, remote, nearly sessile: calyx obconic_, about 4 nun. long, tlie loJ)es 

 short-triangular, shorter than the broadly, turbinate tube: corolla pui^lishj 

 about 8 mm. long, narrow, salverform: ovules solitary,:— Moun,ta,ins of tjfah 

 and NevadaJ i,„J , 



4. GILIA Ruiz & Pav. ,, ,'',,','0' ,' ', 

 Annual, biennial, or perennial herbs, with alternate or opposite, 6htire or 

 divided leaves. Flowers scattered or congested in heads or thyrsifonn pan- 

 icles. Calyx tubular or campanulate, at length split by the enlarging capsule. 

 Corolla tubular or funnelform, with an open funnelform throat, r Stamens tin- 

 equally or equally inserted. Seeds usually developing spirally-twisted threads 

 when wetted. ; / j, 



Key to the Sections 



Leaves alternate, the lowest sometimes' opposite;' ! 



Flowers scattering-solitary, in corymbs, pr, in corymbose- 

 panicles. ..,..,. , • V . , , ' " .. ; , , , , , 

 Annuals, with straight embryo (see also nos. 7 and 8); 11 

 the seed-coats often* 'develpiying mucilage and emit- ■ , - ' ■ 

 ting' spiral threads if wettedv' . . ; , , 1 , , , , 



Ovules solitary in each cell I. PHLOGASTRUU. 



Ovules 2-severaI in each cell IL EUGLLlA. 



Biennials or perennials (except nos. 7 and 8}, with straight 

 embryo; the seedcoats developing" mucilage and emit- 

 ting spiral threads if wetted . . , ,. , , ni. IPOMOPSIS, 

 Flpwers congested in capitate or spicate inflorescences; ' 

 embiT^o broadly curved; calyx and bracts viscid pubes- 

 cent; seed-coats developing mucilage and emitting 



spiral threads if wetted IV. ELAPHOCERA. 



Leaves opposite or rarely alternate and then palmately 3-7- 



cleft or parted. ' ' , i'.. 



Perennials . . . . . . . . . . V. LEPTODACTYLQlf, 



Annuals, with funnelform corolla VL DACTYLOPHl^LLpi. 



L PHLOGASTRUM.-^Leaves entire or divided; flowers solitary or 

 , loosely corymbed;, ,, 



Corolla scarcely longer than. the calyx, salverform. 

 ' Stamens unequally inserted' '' . . ': . . , • 1. G. micrantba. 



, Stamens equally inserted , . , 2. G. Tweedyi. 



Corolla twice as long as the calyx '..'.' . ,'•'■',- . 3. G. teneizima.: 

 II.< EUGQ.IA.^^Leaves pinnatifid or bipinnatifid,' rarely nearly en- 



, 'tire; flowers: scattered-paniculate, j , , . , 

 , Seeds .unchanged if wetted, ' , .' ^ •.''.' , , . , 4. G. leptomeria. 

 ' Seeds eiuittiiig spiral threads if wetted . . , . . 5. G. incoDSpicaa. 

 IH; 'IPOMOPSIS. — Biennials, perennials, or rarely annuals; stems 

 ;-., usually tall;|cprolla usually well exserted from the calyx. 

 Leafy throughout. ' 



Corolla lCh-12 mm. long 6. G. polyanQia.' > 



Corolla 20-50 mm. long. ., 



Annuals; capsule much longer than the calyx. 



Corolla ,more than 3 cm. long 7. G. iongiflora* 



iJ'.*'j'V/j'^- Corolla less than " cm. ilorig . :. , ■ 1 , *, , , 8. G,.: laxmpra. . 

 Biennials; capsule not longer than the ca^yx. . 

 I Flowers red or roseate . . , . . . . 9. G. aggiegata. 

 ""'' "Flowers whitb .' .; . . . i . . . 10. G. attenuata. 



