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Show 14 TIE'TERO TYLED Dll\IORPHIC PLANTS. CHAP. I. CHAPTER I. liETEROSTYLED DIMORPHIC PLANTS : PRil\IULACElE. Primula v ri or tho Cow lip-Diffi rences in structure betwern the tw form -Their degrees of £ rtility when legitim ately nnd illeitimat ly unit d- P. e1atior, vulgari , inensis, auricula, c·c.ummary on the f rtility of the h cterostylcd sp~cics of PrimulaHomo tyl d species of Primula-Hottonia palustris- Antlro::;nce Vitalliunn. IT ha. 1 ng be n known to botanists that tho onmH m w lip (Pri1wula veris, Brit. Fl ra, var. ~tficinalis in.) .. /i ts und r two forms, about qually nn1neron:, whi ·h bvi u ly differ fr m ach th r in the length f th ir 1 istils ncl stamens.* This diffi r nc ha hith rt be n I ked at as a case of 1ncre variability, ut this view, as we shall pres ntly , i far fr In th true on . Florists who cultivat th P olyanthu nd Auricula have long been aware of th two kincl of fl w r , and they call tho plants "hich clisIl · y th gl bular stigma at the mouth of th orolla, pin-h ~ d cl" or "pin-eyed," and those whi h di play th anth r , "thrum- y d." t I will designate th two £ rn1 a th 1 ng-sty 1 d and short-sty led. 'rh pi til in the long-sty 1 cl form is alm t · xaetl y t" i e a 1 ng as that of tho short-sty 1 d. The :tj (rtna * Thi fnrt, according to von Mohl ('JJot.Z itnng-,' 1 G3, p. 326) wn fir t oh crved by Persoon in th )' •nr 17~H. t In John on's Dictionarv, thrum i aid to be the ends of W<!avtr~' threads; and I suppose that some weaver who cultivut d the polyanthus invented this nam , from being struck with ·ome d gr e of resemblance betw nth cln:-;ter of anthers in the mouth of the corolla and the euds of hi threads. UAP. I. RI~I A ERI . 1 th m nth f th 1 thu nt h r n. ~ th.rlH cl n .ar th tnn<l ~ 1 ov tlu ti O'nu , whi \h i 1ni<l<ll of th tuuhn rllt. 1' f [ uifr r nt. : ht 1 in th 1 rti< n ~ 1 >Y lll\1 ... h 1 11 (r ~ r tylc<l f rn . th y an lipping th uu t nut lH r. din· rr·n '( ·. Fi~. 1. Lon - tyl d fonn. hurt- tyl•:d r.,rm. P RD( L \'ERl . w f, nn. · th thr ~ t r .·pnnclt 1! th ~ th ·lun .nt of th nnthc.r: lwiug in th 1( ng- ·tyl cl tlu n in the . . ·hort- 7il]acr ~ ·llilclr •n noti ·c thiH difl'onm ~c · ·t n nk nce]·Jn ' f'.' J,y thr mdin o· ancl orolla f th , lon•,.-: yle<l fl ow r. into I nt th r ' ar , nt11 eh Jnoro iuq ortant 'ti crnu in th lon g-: tyl · 1 furrn |