LOASACE^. 107 



i. MEN TZ ELI A, L. 



Calyx-tube cylindrical or turbinate: tlie limb 5-lobed. Petals 5 or 10. 

 Stamens inserted below the petals on the throat of the calyx. Ovary truu- 

 cate at the summit : style 3-cleft, the lobes often twisted. C'ajjsule oxteu'mg 

 usually irregularly at the apex. — Erect, the stems l)ecomiiig white and shin- 

 ing : leaves alternate, mostly coarsely toothed or pinnaiilid : liuwers cymose or 

 solitary, orange or golden yellow to white. 



* Seeds few, oblong, not wimjed : pefcds 5, not large: Jilamcnts all jUifonn : 



leaves petloled, cut-toothed or angled. 



1. M. Oligosperma, Nutt. Rough and adhesive, 1 to 3 feet high, much 

 branched, branches brittle : leaves ovate and oblong : petals yellow, wedge- 

 oblong, pointed: capsule about 9-seeded. — From the mountains eastward 

 across the plains to Illinois and Texas. 



* * Seeds few to manij, irregularlji angled or somewhat cubical, not iriw/id : 



petals 5, not large: ^filaments all fliform: capsule linear: leaves sessile, sin- 

 uatehj toothed or pinnatijid. 



2. M. albicaulis, Dougl. Slender, 3 inches to a foot high or nmre : 

 leaves linear-lanceolate, pinnatijid with numerous narrow lobes, upper lea\es 

 broader : flowers mostly approximate near the ends of the branches : petals 

 spatulate or obovate : capsule linear-clavate : seeds numerous, rather strongly 

 tubercidate, irregularhj angled with ol)tuse margins. — Torr. & Gray, Fl. i. 534. 

 From Xew Mexico and Colorado to Oregon and California. 



3. M. dispersa, Watson. Very similar, but the leaves sinuate-toothed, 

 sometimes entire, rarely pinnatifid, the uppermost often ovate : .eccr/s somewhat 

 cubical and verg nearlg smooth . — Proc. Am. Acad. xi. 11.5. M. <ilhicaulis,\SiT. 

 infegrifolia, Watson. From Colorado through Idaho to Washington and 

 California. 



* * * Seeds numerous, suborbicidar-winged ornarroiol //-margined : petals 5 or 10, 

 ■ ojlen large and showi/ : outer Jilamenls often petaloid : capsule broad, oblong : 



leaves as in the last. 



-4- Flowers vespertine, j/elloivish white. 



4. M. ornata, Torr. & Gray. Rough with short-barbed hairs : leaves 

 oblong-lanceolate, the segments rather acute : flowers verg large, ternnnating the 

 branches, bracteolafe: petals 10, about 2 inches long: Jilamenfs all filiform : 

 capsule 5 to 1-valved at the summit: seeds scarcely margined. — Fl. i. 534. 

 Along the Missouri and its tributaries ; also in S. W. Colorado. 



5 M. nuda, Torr. & Gray. Rough with minute barbed pubescence: 

 leaves somewliat lanceolate,///*? segments ol>tuse: flowers <dtout h<tlf the size of 

 tlie last, not hracteol ate: petals 10: exterior filaments petaloid and often sterde : 

 capsule 3-valved at the summit : seeds plainly winged. — Loc. cit. 535. 

 •*- +- Flowers expanding onlg in bright sunshine, bright i/ellow: leaves lanceolate. 



6. M. laevicaulis, Torr. & Gray. Stout, 2 or 3 feet high: flowers se.<:sile 

 on short branches, veri/ larqe: calgx-tube naked : petals acute at each end. 2 to 

 2^ inches long: seeds very minutely tuberculate. — T.oc. cit. W. Wyoming 

 and Montana to the Columbia River and S. California. 



7. M. pumila, Torr. & Gray. Rather stout. S to \0 inrhrs high: lower 

 leaves somewhat petioled : Jlowers small, solitary or three together, terminating 



