1934 VINCA VINCA 



slowly but surely in about a montb, and until February dark purple fls. ; aurea yarieg&ta, witli golden variega- 



will do very well in a 2H-inch pot. About the middle of tiou; cserdlea, with single blue fls. ; pl6na, with double 



February shake off the soil and give them a 3-inch pot, blue Hs. ; rdsea, with single rosy fls. ; purpurea pl^na, 



and they will make a fine growth bv middle of May. In with purple double fls. Gn. 50:1078. Some of these are 



2671. Vinca 



growing these trailing Vincas in pots the principal point 

 to observe is never to let them want for water. 



William Scott. 



Vinca is a genus of herbs or subshrubs, erect or pro- 

 cumbent: Ivs. opposite: fls. rather large, axillary, soli- 

 tary; corolla salver-shaped, with a narrow throat which 

 is pilose inside or thickened-calloused; stamens in- 

 cluded above the middle of the tube; carpels 2, distinct; 

 stigma annular, thick, viscid; ovules 6-many in each 

 carpel, in 2 series: follicles 2, erect or divergent. The 

 genus may be divided into 2 sections: 1. Pervinca, in 

 which the anther-cells are short and divided by a wide 

 connective; 2. Lochnera, in which the anther-cells are 

 normal. K. rosea belongs to Section 2; the others men- 

 tioned below are included in Section 1. 



INDEX. 



Trailing herbs, hardy or nearly so, only the short 

 flowering stems ascending: fls. produced in spring 

 or early summer, mostly blue or white. European 

 species. 



B. Folii 



vate 



vergreen. 

 oblong-nvate: corolla-lobes u'edge- 



shaped: calyx glabrous. 



1. minor, Linn. Common Periwinkle. Blue, Rdn- 

 NiNO or Trailing Myrtle. Fig. 2671. Hardy evergreen 

 trailing herb, in all country gardens and running wild 

 in cemeteries and shady places, the blue-fld. or typical 

 form being commonest. Often called "Myrtle" but the 

 classic myrtle is Myrtus communis. Very rarely pro- 

 duces seed, but spreads freely by creeping sterile stems 

 which root at every joint. Lvs. ovate or oblong-ovate, 

 glabrous and shining, barely IK in. long: petiole very 

 short, with 2 glands near the apex: calyx-lobes lanceo- 

 late, glabrous; corolla - lobes wedge-shaped, obtusely 

 truncate. Eu. 



The following horticultural varieties are advertised in 

 America: Var. ilba, with single white fls.; alba pl^na, 

 with double white fls. ; alba varlegita, with single white 

 fls. and variegated foliai;i-; argentea variegSta, with 

 silvery variegation; atropurpiirea comp&cta, with single 



advertised without reference to V. minor, as if they 

 were good species, thus F. carulea and purpurea. V. 

 eleqantissima alba belongs here, also "The Bride," a 

 white variety with a pink center. 



cc. Lvs. subcordate-ovate: corolla-lobes obovate: calyx 

 ciliate. 

 2. mijoT, Linn. Larger Periwinkle. Larger in all 

 its parts than V. minor, not quite hardy north, and root- 

 ing only at the tips of the sterile stems. Lvs. broader 

 below the middle than in T. minor, subcordate-ovate, 

 often 2-3 in. long, ciliate; petiole with 2 glands near the 

 apex : fls. blue ; calyx -lobes narrowly linear, ciliate ; 

 corolla-lobes obovate. Eu.-Thi; ' ' " " 



ject to mealy bug. The va- 

 riegated forms are popular 

 for veriinda boxes and 



maculata, Hort. I', major, 

 vars. variegElta and reticn- 

 Ikta, are also advertised. 

 Var. elegantissima, Hort., 

 is a handsome form with 

 lvs. bordered and blotched 

 with yellowish white. It 

 seems to be common with 

 the floiists, although it is 

 rarely, if ever, advertised 

 in American trade cata- 

 logues. It is one of the 

 best forms for vases for 

 baskets and for decora- 

 tion indoors. The sprays 

 should be allowed to grow 

 long, in order to develop 

 their characteristics. Cut- 

 tings should be struck 

 early in the fall and if kept 

 growing steadily will make 

 satisfactory specimens in 

 five-inch pots. It is a good 

 idea to plant this variety 

 in the front part of a sunny 

 greenhouse bench where 

 the long sprays may reach do" 

 window -box plant it has the 

 considerable neglect. 



Vinca rosea. 



: nearly K). 



■> the walk. As a 



t of withstanding 



