73% FLORA. 



long, 10-20 mm. wide; pods ascending, stem often much stouter. Tenn. to Kans. 

 Fla. and La. April— June. 



2. VINCA L. 



Herbs, some species slightly woody, with opposite leaves, and large solitary 

 axillary flowers. Calyx 5 -parted, the segments acuminate. Corolla salverform, 

 the tube pubescent within, the lobes oblique. Stamens included. Disk of 2 glands, 

 alternate with the 2 carpels. Ovules several in each carpel; style filiform; stigma 

 annular, its apex penicillate. Follicles 2, cylindric, several-seeded. Seeds oblong- 

 cylindric, truncate at each end. [The Latin name.] About 12 species, one native 

 of tropical Am., occurring in Fla., the others of the Old World. 



1. Vinca minor L. Periwinkle. Myrtle. (I. F. f. 2894.) Perennial, 

 trailing, glabrous; stems 1. 5-6 dm. long. Leaves oblong to ovate, entire, firm, 

 shining, green both sides, narrowed at the base, short-petioled, 2-6 cm. long; 

 flowers blue, 1.8-3 cm - broad; peduncles 1-4 cm. long; calyx-segments subulate- 

 lanceolate, glabrous; corolla-tube expanded above, as long as or slightly longer than 

 the obovate, nearly truncate lobes; anther-sacs with a broad connective. Escaped 

 <xom gardens, Ont. to Conn., N. Y., N. J. and Ga. Native of Europe. Feb. -May. 



3. APOCYNUM L. 



Perennial herbs, with opposite entire leaves, and small white or pink flowers in 

 jorymbed cymes. Calyx 5 -parted, the segments acute. Corolla campanulate, the 

 tube bearing within 5 small triangular appendages alternate with the stamens, the 

 limb 5-lobed. Stamens inserted on the base of the corolla; anthers sagittate, con- 

 nivent around the stigma and slightly adherent to it. Disk 5-lobed. Ovary of 2 

 carpels; ovules numerous; stigma ovoid, obtuse, obscurely 2-lobed. Follicles slen- 

 der, elongated, terete. Seeds numerous, small, the apex tipped with a long coma. 

 [Greek, dogbane.] About 15 species, of the north temperate zone. - 



Corolla 5-9 mm. long, its lobes spreading or recurved. 



Corolla not angled, pink, its tube narrowed in the throat. 1. A. androsaemifolititn. 

 Corolla 5-angled, white or faintly pink, its tube not narrowed in the throat. 

 Corolla campanulate, 6-7 mm. long. 2. A. medium. 



Corolla urceolate to tubular, 4-6 mm. long. 



Calyx-segments triangular-ovate, much shorter than the corolla-tube. 



3. A. Milleri. 

 Calyx-segments lanceolate, about as long as the corolla-tube. 



4. A. urceoli/er. 

 Corolla 3-4.5 mm. long, its lobes erect or nearly so. 



Leaves and cymes glabrous, or somewhat pubescent. 

 Leaves petioled, mostly narrowed at the base. 



Leaves ovate-oblong to lanceolate, 2-4 times as long as wide; flowers green 



to whitish. 5. A. cannabinum. 



Leaves oblong-lanceolate, 4-6 times as long as wide; flowers white. 



6. A. album. 

 Leaves sessile or very nearly so, mostly cordate-clasping or obtuse at the base. 



7. A. Jiypericifoliitm. 

 Whole plant, including the cymes, densely soft-pubescent. 8. A. pubescens. 



1. Apocynum androsaemifolium L. Spreading Dogbane. Honey- 

 bloom. (I. F. f. 2895.) Rootstock horizontal; stem 3-15 dm. high; branches 

 broadly spreading, mostly glabrous. Leaves ovate or oval, mucronate, glabrous 

 above, pale and usually more or less pubescent beneath, 5-10 cm. long; petioles 

 4-8 mm. long; cymes loose, usually both terminal and axillary; pedicels 4-10 mm. 

 long, subulate-bracted at the base; flowers about 8 mm. broad; calyx-segments 

 shorter than the terete tube of the pinkish corolla; corolla-lobes revolute, rounded; 

 follicles 10-17 cm. long, narrowed at the apex. In fields and thickets, Anticosti 

 to Br. Col., (la.. Neb. and Ariz. June July. 



2. Apocynum medium Greene. INTERMEDIATE Dogbane. Rootstock hori- 

 zontal; stem stout. 7-13 dm. high, the branches ascending, glabrous. Leaves 

 oblong to oval, mucronulatc, ascending, 6 o cm. long, somewhat pubescent beneath; 

 petioles 4 8 mm. long; cymes compact, all terminal; pedicels > 5 mm. long: flowers 

 erect; calyx-segments about half as loin' as Hie 5 angled corolla-tube; corolla white, 



