cr 

 to' 



8. Phillipjea* Calyx bracteolate, tubular, 4-5- 

 toothed. Corolla ringentj upper lip 2- under 3-lobed, 

 spreadin 



9- Epiphegus. Flowers polygamous. Calyx brac- 

 teolate, urceolate, 5-toothed. Corolla bilabiate, upper 

 lip entire, under 3-lobed. 



IV. HrOBANCHEEJE* 



10. Hyobanciie. Calyx bracteolate, deeply 5- 

 cleft. Corolla ringent, upper lip long, entire, under 

 small, obscurely 3-toothed. Anthers deflex, pendu- 

 lous, 1-celled! 



11. Campeellia, Calyx bracteolate, tubular, 5- 

 toothed. Corolla sub-bilabiate, 5-lobed. Anthers 

 deflex, pendulous, one-celled! opening by a pore at 

 the apex. 



12. CHRisTisojyiA. Calyx tabular, 5-toothed. 

 Corolla infundibuliform, sub-bilabiate. Anthers 2- 



that point of structure yet extends, little benefit is 

 likely to result from its study as an ordinal charac- 

 ter; however valuable it may prove as a generic 

 one. The fact, however, of the stigma being simply 

 two-lobed, seems to throw much doubt on the cor- 

 rectness of the views I have been led to take as to 

 the plurality of carpels, but does not altogether in- 

 validate them, as each lobe may be formed from the 

 union of two adjoining carpels, but it seems more in 

 accordance with analogy, as regards the rest of the 

 order, to suppose that each carpel has two placentae 

 placed a little within the margin. But that theory 

 will not account for cases, of which I have seen 

 many, in which 5 placentae occur. Were they con- 

 stantly in pairs 2-4-6 that explanation might be ad- 

 mitted, but in cases where an odd one occurs, it 

 cannot be accounted for on that principle though 

 easily explained on the principle I have supposed, 

 viz. "plurality of carpels with the placentae formed 

 in the usual way along the line of union of each 

 pair. 



^ This view is further supported by the fact, 



celled, one sterile, subulate. Placenta free, re- that I have occasionally observed a tendency to 



volute, 



13. Harvkya. Calyx inflato-campanulate,5-lobed. 

 Corolla tubular, sub-bilabiate, 5-lobed. Anthers 2- 



dilatation, or spreading to the right and left, of the 

 margins of the placentae in Orobanche. But on this 

 question further observation is required, and for the 



celled, one sterile, subulate. Ovary 2-celled, with ^'f^.^^'l e»°"g^ ^^' ^^^^ said to call attention to the 



2 fleshy placentae in each. 



14. AUI.AYA. Calyx tubular, 5-cleft. Corolla 

 tubular, 5-lobed. Anthers 2-celled, one sterile, sub- 

 ulate. Ovary 2-celled, with a single axillary, pla- 

 centa in each. [Obs. Mr. Bentham remarks of this 

 genus, "placentae in diversis speciebus magis minus 

 ve bilob^," which seems to indicate that it is cor- 

 rectly referable to this order.] 



P. S. After the above was written, I received 

 the 11th Vol. of De Candolle's Prodromus containing 

 N the article Orobanchacece by M. Renter. On look- 

 ing over it, perhaps rather hurriedly, I do not ob- 

 serve any thing tending to invalidate the views I 

 have ventured to advance, except with regard to the 

 genera of my section Orobancheetz which, if I 

 rightly understand, he considers have all decarpel- 

 lary ovaries, while I suppose there are as many 

 carpels as placentae, each placenta being formed by 

 the union of the edges of 2 carpels the same as 

 occurs in most other ovaries having parietal pla- 

 centae. Nor can I see upon what grounds we are 

 to adopt other views with respect to this family. I 

 must certainly admit that it is unusual for the same 

 species and even the same individual to furnish in 



so many flowers, examples of 4-5 and 6 carpels to bilobed stigmatic surface, 

 the ovarf^^vhich I find in Orobanche, But I be- 



subject- 



1420, CxsTANCHK LUTEA (Link and Hoffinans. 

 C, tubulosay R- W- in Icon. Philipaa lutea, Desf), 

 scape simple, fleshy, sulcated: bracts opaque, ovato- 

 lanceolate, substriated, longer than the calyx: calyx 

 campanulate, lobes ovate, obtuse: corolla narrow at 

 the base, tubular, arched outwards, dilated at the 

 throat, 5-cleft, lobes ovato-rotundate equal, spread- 

 ing: stamens hairy at the base: anthers large, ob- 

 solately mucronate : stigma capitate, emarginate. 

 (Renter in D. C, Prod.) 



"Scape furrowed, tiiick and fleshy, bracts elon- 

 gated, acuminate, amplexicaul at the base and, like 

 the shorter bracteoles, downy, translucent at the 

 edges, and sometimes obscurely toothed. Calyx ^ 

 the length of the corolla, its segments rounded, often 

 obscurely crenate. Corolla bent outwards from the 

 middle, lower-half tubular, erect, upper-half bell- 

 shaped, inclining outwards ; throat very wide with 

 two dimples anteriorly; limb slightly 5-cleft, with 

 equal, rounded, turned down lobes ; bottom of the 

 tube with the insertions of the stamens densely 

 woolly. Anthers apiculate, all cohering by the 

 woolly hairs fringing the pollen clefts. Style with 

 a clubbed, compressed, nodding tip and a somewhat 



lieve it is equally rare to find similar variations in the 

 number of placentae to each carpel, and for the sim- 

 ple reason that the one is, with very few exceptions, 

 dependent on the other, the carpellary margins only, 

 except in these few instances, being placentiferous. 

 One circumstance, to which he seems to have paid 

 much attention, merits notice, namely, the position 

 of the lobes of the stigma in relation to the floral 

 axis, which he finds right and left in some, anterior 

 and posterior in others, implying that in the former 

 the placenl<2 are anterior and posterior, and right and 

 left in the latter. In Orobanche they are right and 

 left, and in Conopholis and Anoplanthns anterior and 

 posterior. How are these differences to be account- 

 ed for? I am unable to say, but their existence 

 goes far to show that, so far as our information on 



"Scind, in loose, sandy soil, on roots of Salsolas — 

 grasses, and Calotropis Hamiltonii, &c. P. calotrO" 

 pidisy (Edgeworth)? 



"A fine species, varying from 6 inches to 6 feet, 

 from the point of attachment to the apex of spike. 

 General colour yellow with an occasional tinge of 

 purple: colour of flowers generally yellow, with a 

 tinge of purple before expansion; or sometimes 

 muslin white with two yellow streaks. Carpels 

 each with two biseriate placentas, when a third is 

 present (which is rare) it is situated anteriorly. Cap- 

 sule about an inch long with numerous seed, like 

 coarse gunpowder." Stocks' MSS. description which 

 accompanied the drawing of Fig. 1420-bis. 



A comparison of the placentation shown in trans- 

 verse sections of the ovary of this, with that of No. 

 1353, which presents a placentary structure, quite in 



( 4 ) 



