

BORKAGINACEAE 995 



pedicels 5-11 cm. long : calyx 5-7 mm. long, becoming 10 mm. long 'at maturity ; lobes 

 broadly triangular or ovate-triangular, shorter than the tube : corolla lurid yellow or 

 greenish, 1.5-2 cm. long ; tube inflated and constricted near the throat ; limb 10-15 mm. 

 broad, the rounded lobes veiny : capsules broadly ovoid, or globose-ovoid, 8-10 mm. long. 



In fields and waste places, Ontario to Minnesota, New York and Florida. Escaped from cultiva- 

 tion. Summer. 



5. Nicotiana glauca Graham. A branching shrub, or a tree becoming 6 m. tall : 

 leaf -blades ovate or oblong-ovate, 5-30 cm. long or sometimes larger, undulate, long or 

 slender-petioled : panicles long : pedicels mostly less than 10 mm. long : calyx 11-15 mm. 

 long ; lobes lanceolate or triangular-lanceolate^ shorter than the tube : corolla yellow or 

 yellowish, 3.5-4 cm. long; tube gradually enlarged to the slightly constricted throat; 

 limb about 10 mm. broad, the lobes broad but acutish : capsules narrowly ovoid or oblong- 

 ovoid, 10-12 mm. long. 



In waste places, seaports of the Gulf States and California, and on ballast further northward. 

 Also in tropical America. Native of Argentina. 



13. PETUNIA Juss. 



Annual or perennial herbs, with viscid-pubescent foliage and branching stems. 

 Leaves alternate : blades entire. Flowers solitary in the axils. Calyx of 5 partially 

 united sepals : tube rather short : lobes narrow. Corolla white, violet, purple or varie- 

 gated, funnelform or salverform : limb spreading, plaited, nearly regular. Stamens 5, 4 

 didynamous, fertile, the fifth smaller or obsolete : filaments adnate to the base of the co- 

 rolla-tube. Ovary 2-celled. Stigma 2-lobed. Capsule 2-valved : valves entire. Seeds 

 numerous, rugose. 



1. Petunia parviflora Juss. Annual, somewhat pubescent. Stems more or less dif- 

 fusely branched, 1-4 dm. long : leaves rather fleshy ; blades spatulate to oblong, 0.5-1.5 

 cm. long, entire : calyx glandular-pubescent ; lobes linear or linear-spatulate, 4-6 mm. 

 long : corolla about 5 mm. long ; tube yellowish or pale white ; limb purple, 6-8 mm. 

 broad : capsules ovoid, 3-4 mm. long, surpassed by the calyx-lobes. 



In dry soil, Florida to Texas and California. Throughout tropical America. Spring to fall. 



14. BOUCHETIA DC. 



Perennial herbs, with viscid-pubescent foliage and decumbent or ascending stems. 

 Leaves alternate : blades entire. Flowers on solitary pedicels terminating the branches, 

 or opposite the leaves. Calyx of 5 partially united sepals : tube rather long-campanu- 

 late : lobes narrow. Corolla commonly white, funnelform : tube dilated above : lobes 5, 

 broad, plicate. Stamens 5, included, 4 didynamous, the fifth smaller : filaments adnate to 

 the lower part of the corolla-tube. Anther-sacs confluent at the apex. Ovary 2-celled. 

 Capsule 2-4-valved. Seeds numerous, granular. 



1. Bcmchetia an 6 ma la (Miers) Britt. & Rusby. Stem more or less branched, 1-3 

 dm. tall, finely pubescent. Leaf-blades oblong, elliptic, oblong-spatulate or lanceolate to 

 broadly linear above, 1-3 cm. long, entire, the lower ones petioled : pedicels terminal, 

 1-1.5 cm. long : calyx 6-10 mm. long ; lobes lanceolate or linear-lanceolate, as long as the 

 tube or somewhat shorter : corolla mainly white with delicate purple lines, about 1 cm. 

 long, broadly funnelform ; lobes broad and rounded : capsules oblong or ovoid-oblong, 

 7-8 mm. long. 



On prairies and rocky hillsides, Texas. Also in tropical America. Spring to fall. 



FAMILY 7. BORRAGINACEAE A. Gray. BOB AGE FAMILY. 



Herbs or shrubby plants, with watery sap. Foliage commonly clothed with 

 bristly pubescence. Leaves alternate, without stipules : blades simple, mainly 

 entire. Flowers typically perfect, regular, or sometimes irregular, more or less 

 remote from the bracts, cymose, but apparently in spikes or racemes, which are 

 often scorpioid. Calyx of 5, or rarely 4, more or less united sepals, persistent, 

 sometimes corolloid. Corolla hypogynous, deciduous : limb 5-lobed : lobes 

 usually equal, convolute, plicate or induplicate. Androecium of 5 stamens, ad- 

 nate to the corolla-tube, sometimes as high as the throat. Filaments often 

 appendaged. Anthers introrse. Gynoecium of 4 nearly distinct or more or less 

 cohering carpels. Styles united, arising from between the ovary-lobes. Stigma 



