[78]

Jalappa

p. 20 E

 

Inverse. (p.397) viz. J. longiflora ♀ (not tried by Gärtner)

J. vulg. ♂ tried on all

(very good case because Hybrids not very sterile)

varieties from year 1760 to 1774 more than 200 times all failed !!!!!! — (Yet in Dic Class. Vol 8. p. 405. reference is given to successful experiment of Pelletier whose plant seeded by itself & to anonymous one at Berlin, which Koelreuter seems quite to disbelieve, says they are fictitious experiments. — See to Pelletier (8 Vol. Annales du Mus. d' Hist. Nat.) case; effect of diff. of climate ?? France & Germany

p. 398. J. longiflora ♀
J Hyb. {J. vulgar. fl. rub. ♀
J. longiflora fl ♂ (on one flower}
♂ See p. 26 of this abstract to show & p. 24
(not tried by Gärtner)

Concepcio nulla. — yet we see the ♂ hybrid seeds itself pretty freely — what a small dash of ♂ vulg. prevents faecundation or is it that the J. longiflora never serves as Hybrid mother?? — I sh^d. think so.

(J. dichotoma having been specially mentioned as infertile & flowers dropping, I presume J. longiflora is not so by itself. —

[79]

Jalappa or Mirabilis

30 (20

Nov. Act. 1793 p. 394

aa grandchildren of this cross described p. 27 & 32.

J. vulg. fl. rub. ♀ (Both Indies G)
― longiflora ♂ (Mexico. G.)

(on many flowers) seeds produced many plants pretty nearly intermediate = made same cross with other varieties of J. vulg. with same result. except colour of corolla = These hybrids gave of themselves "parvum bonorum seminum numerum", but apparently less seed than in cross with another variety.— was this good effect of Crossing

Branches larger & thicker, than parents. & weight of plant & weight of roots extraordinarily larger in every case than either parent — These Hybrids flowered, later than parents, on account of strength of latter being exhausted by "seminum copiam". p.20

These Jalappa are "Mirabilis" genus of modern authors

[78v]

aa Gives descript. of parent plants of Jalappa

p. 391. says under head of J. dichotoma, "praeterea post initium florescentiae, ut in hybridis, multi ipsium florum integri ac infaecundati delabuntur, donec tandem temporis successu seminae bonae preferant."

Says leaves are apt to fall, on account of too much moisture, says he has observed this happens less. "ipsamque ad faecundationem suorum germinorum paratiorem esse, si in oblam plantatam in statu sicciore servetur."

Most important

[80]

Jalappae

31

(Very interesting) grandchildren described p.33

1793 p.394 This not tried by Gaertner; but dichotoma once used as species.—

J. vulg. ♀ }

J. dichotoma — Mexico ♂ } tried also with varieties of the J vulg. with same results. —

p 30 offspring with cross described continued but varying fertility.

Produced many plants "intermediate". "Omnes magnitudine non modo ♂, sed etiam ♀ & multum superabant, ineo huic ratione fertilitatis, parum vel nihil cedem mihi visae sunt, adeo ut eas vix pro genuinis hybridis agraissem, nisi portentosa statura veram ipsarum naturam prodidissent."

As they flowered before ♀ many of them also came also sooner to maturity — So quite new character test for hybrids introduced !!!!!! — it is very curious this greater luxuriance & size & weight. — Inverse experiment, (& on the varieties) produced similar plants & likewise large rooted ones &c &c. (See Back)

Is not this similar to greater luxuriance of alpine plants when grown in low country. — temperate trees & wheat in Tropics — I may conclude, infertility is no more test of species, than the fact that a plant of cold country carried into tropics aborts; it is not even necessary to the existence of species, as primrose & cowslip shows.

[80v]

might be well to introduce this curious case

That J. vulg & dichotoma are not same species may be assessed (female [illeg] that when

crossed with J. longiflora, the hybrids are of different fertility. See p

[81]

Jalappa

32 (22

granchildren described p. 35

p. 396. J. Dichotoma ♀ }

J. longiflora ♂ } inverse failed on 9 flowers. (J. longiflora seems never to serve as mother.)
(failed with Gärtner)

Four plants produced which vegetated quicker than natural & had larger roots & weight of plant than parents — They resembled the hybrids between J. vulg. ♀ & J. longiflor ♂. except somewhat lower & "multique infaecundiores magnum enim florum numerum, quos pulvere antherarum ♀ vel ♂ de industriâ conspergetam, nec unica quidem vera insecuta inde est faecundatio. Interea, autumnum versus, in nonnullis floribus sponte ea se exhibuit, licet ultra unum alterumve semen bonum ex singulis individuis haud obtinuerum". — Vide p. 35 where the grand children are described.

(Here is instance of cross not succeeding, so well as own this might have come from other individual pollen.)

does not cross more especially apply to fertility of offspring???

[82]

Jalappae

33 (23

p. 397. J. Hyb { J. vulg ♀ }
J. dichotoma ♂ } ♀. This hybrid is as fertile as parent.

J. longiflora ♂ (& longiflora is very fairly fertile with J. vulg.) but longiflora with dichotoma very slightly fertile

on 41 Flowers — yet only one good seed, which produced splendid plant (aa) — The great infertility in this case must be caused by incongruity of the J. longiflora with the J. dichotoma, wh. incongruity not being removed by presence of half blood of J. vulgaris. — See previous Page

p. 398. Note: says by crossing he has converted Nicotiana Nastica into N. paniculatam which intra omnes necessitatem he followed up to 20 generations: hence in less than this all characters are lost. & vice versâ: & a vast number of different species of pinks one into another — From what he has seen sure same could be done with animals. —

[82v]

(a) Nova Acta 1797, p. 391

This splendid plant which is grandchild of pure parents produced one plant grt. grandchildren — fertility not mentioned.

Read again — I now have.