FLOWERING PLAXTS AND FERXS OF ARIZONA 677 



4. Flowers usually several or numerous in a more or less elongate inflorescence, 



some of them usually axillary well below the apex of the stem; corolla 



narrowly funnelform or subcylindric (5). 



5. Calyx irregular, spathaceous, cleft on one or both sides, toothless or with 



1 or 2 subulate teeth much less than one-third as long as the tube. 



4. G. forwoodii. 

 5. Calyx nearly regular, not spathaceous, with 5 well-developed teeth at 

 least one-third as long as the tube; corolla nearlv closed in anthesis 

 (G). 

 6. Inflorescence relatively short and dense, seldom constituting more 

 than one-third of the length of the stem, not conspicuously leafy- 

 bracted, the floral leaves erect or narrowly ascending, not sur- 

 passing the flowers; stem leaves (excluding the basal and floral 

 ones) with lanceolate blades not more than 5 times as long as 

 wide: calyx lobes oblong-lanceolate, equaling or somewhat longer 

 than the tube; corolla 25 to 35 mm. long, the lobes acutish to 



acuminate 5. G. affixis. 



6. Inflorescence elongate and rather loose below, usually constituting 

 more than one-third (sometimes one-half) of the length of the 

 stem, conspicuously leafy-bracted, the floral leaves spreading 

 and much surpassing the flowers: stem leaves with lance-linear 

 blades 7 or more times as long as wide; calyx lobes subulate, 

 from much shorter to longer than the tube; corolla 20 to 25 mm. 



long, the lobes obtuse and apiculate 6. G. bigelovii. 



3. Corolla without folds in the sinuses (7). 



7. Lobes of the corolla with erose or fimbriate margins; flowers usually 4- 

 merous, solitary or not more than 3; corolla 25 mm. long or longer, 

 not fimbriate internally (8). 

 8. Plant perennial; flowers solitary, sessile or very nearly so, closely in- 

 vested by the bractlike uppermost pair of leaves, occasionally also 

 with 1 or 2 closely contiguous axillary flowers on short, bractless 

 peduncles; corolla lobes long-fimbriate from below the apex nearly 

 to the base; filaments bearded below; stems not more than 15 cm. 



long 7. G. BARBELLATA. 



8. Plant annual; flowers solitary, on naked peduncles at least 2 cm. long 



(usually much longer) ; margins of the corolla lobes erose and 



fimbriate at and near the apex; filaments naked (9). 



9. Stems from base to the uppermost leaves not more than 25 cm. long, 



seldom with more than 3 pairs of leaves: peduncle up to 15 cm. 



long but usually much shorter: calyx lobes shorter to somewhat 



longer than the tube; corolla 25 to 45 (rarely 50) mm. long. 



8. G. THERM ALLS. 



9. Stems to the uppermost leaves 20 to 50 cm. long, often with 4 or more 

 pairs of leaves; peduncle 10 to 20 cm. long; calyx lobes much 

 longer than the tube; corolla 45 to 60 mm. long. 9. G. gbandis. 

 7. Lobes of the corolla with entire or nearly entire margins; flowers usually 

 5-merous, numerous, in terminal and lateral clusters: corolla not more 

 than 25 mm. long, fimbriate internally (except in G. microcalyx) ; 

 plant annual or biennial; stems quadrangular, the angles often nar- 

 rowly winged (10). 

 10. Calyx without a distinct tube, parted or cleft very nearly to the base, 

 the lobes strikingly dissimilar, 2 of them foliaceous, about one-third 

 longer and at least twice as wide as the others; corolla pale blue or 



ochroleucous 10. G. heterosepala. 



10. Calyx with a distinct but short tube, the lobes unequal in length and 

 width but not strikingly dissimilar (ID. 

 11. Corolla 20 to 25 mm. long, ochroleucous: calyx lobes lanceolate, 

 sharply acuminate; plant strict, the branches nearly erect. 



11. G. WRIGHTII. 



11. Corolla less than 20 mm. long (12). 



12. Calyx spathaceous (split down one side\ the tube thin-scarious. 

 much like the corolla in texture, whitish or purplish, much 

 longer than the thick, subulate, green teeth, these less than 

 1 mm. long; corolla conspicuously fimbriate internally. 



12. G. wislizexi. 



