Tab. 5. 
PTEROSPORA ANDROMEDEA. 
Nat. O Monotropex, Nuttall Linn. Syst. Decandria Monogynia. 
Nat. Orp. ; 
I teros @) oie ] I te ti , St 10. A > 
Ya, Nutt. , Cal x J p y e % | | | 
Flores racemoszt. 
Pterospora Andromedea. Nutt. Gen. 1. 269. 
oan et . ‘jatus, spi sus, vel cubitalis. Folia 
D Herba brunnea, parasitica? viscido-hirsuta. Cau/lis simplicissimus, teres, striatus, spithameu ; ubite fs 
Se ryae dele ; : . : sais 4 ior: 1oré yauld majora. acemus 
i i lat amiformia, glaberrima, acuminata, uninervia; inferiora confertiora, et pé major 
ea et A = 5-phyllus, sepalis ovato-lanceolatis, corolla brevioribus, serrulatis, 
inalis, cylindraceus. ores cernui, bracteolati. Calyx 5-phyllus, sez Sper : 
terminalis, cy ; Ib : ea, ovata, glaberrima, 5-dentata, dentibus wstivatione valvatis, brevibus, recurvis, 
ess] ig’ apice ros ’ ; 1 ; 
pe Y fis longit di "Filament ligulata, per axin crassiora, sursim attenuata. Anthere antice, 
ii ne ne. ’ : f 
: ina 10, hypogyna, pistilli longitudi Reel ; ; nea aE aay 
ee ae ti - Se o1acuiae ; loculis lateralibus, longitudinaliter dehiscentibus, inequalibus ; posteriore minore, 
incumbentes, stigmati appresse, 2- 3 es eee ae " wlis-eithoat 
oe 1 se ee producto. Pollen sphericum, hic et illic papillosum. Ovarium disco nullo, 5 ota ee ilis g ; 
Ser ae . : 0" icum, obscuré 5-lobum. 
semidistinctis. Placenta dilatate, polysperme, in loculos protruse. Séylus teres. Stig ma conicum, RA NORIO ES 
; . : , i ili y persistente coronata, 9-locularis, 5-valvis ; 
depressa, pisi majoris magnitudine, rotundato-pentagona, apice umbilicata, stylo | ante co a ra. 
P zee : i iferis. Semina plurima, minutissima, a/d terminali, duplici, re- 
valvis vix plusquam apud marginem dehiscentibus, medio septiferis. Semina } ) ) ee a as 
Ts roti i ati , ‘emitatem coarctatis. Embryo minutus 
Testa tenuis, fragilis, reticulis medio elongatis, ad utramque extremitate é “¥ : 
Capsula 
ticulata cristata. 
indivi in api inis carnosi. 
obovatus, indivisus, in apice album 2a - . 7 
Ozs. ‘Testa triplex ; exterior fragilis, intermedia spongiosa, intima tenuissima, utrinque in apiculo contracta. 
eaten TTSSTRREN RU 
We are much gratified by having an opportunity of publishing this exceedingly rare and curious N orth apni 
plant. Our figure is taken from very complete specimens gathered near Quebec by Mr. J ohn Gouldie. Mr. Nuttall, 
who first described it, appears to have had imperfect materials for examination ; for he describes his plant as entirely 
destitute of leaves, which, nevertheless, are undoubtedly present under the form of scales, clothing the stem. It pro- 
bably might be cultivated in peat soil among other American plants ; and its very pretty flowers, and curious appear- 
ance, would make it no contemptible addition to our botanical riches from that quarter of the world. 
Mr. Nuttall refers it to his natural order of Monotrorem, which would have been better called Pyrotex, along 
with Monotropa, Hypopitys and Schweinitzia ; but he does not absolutely include Pyrola, notwithstanding its evident 
affinity with the other genera, and especially with Péerospora. In the somewhat inaccurate character of the genus 
which Mr. Nuttall has given, the structure of the seeds is not described ; which, however, establishes beyond doubt 
the propriety of placing it and Pyrola near each other in any natural arrangement. 
The embryo is very small, apparently undivided, as Geertner describes that of Pyrola to be, and like it placed at 
the extremity of the fleshy albumen ; but there is a remarkable difference between my observations on the embryo of 
Piterospora, and those of the learned and laborious carpologist just mentioned upon Pyrola. He has described and 
figured the embryo of the latter as at that end of the seed which is next the hilum. After a most careful examination 
of Pterospora, it appears to us that its structure is just the reverse ; and that its embryo is at that extremity of the 
albumen which is furthest removed from the hilum. The structure of Pyrola is nevertheless so very similar to that 
of Péerospora in other respects, that we entertain no doubt of the resemblance equally existing in the seeds. We 
are therefore disposed to question the correctness of the observations of ourselves or Gertner, rather than the resem- 
blance of the two genera ; especially as the extreme minuteness of the parts, from which the still more minute cha- 
racter of the embryo is derived, is such as fully to justify us in our uncertainty. We confess that the admirable accu- 
racy of Gertner, and the analogy of Pyrola with Ericem, induce us to fear we may have been mistaken ; but as we 
have examined the seeds of Pterospora with the utmost attention, repeatedly ; and as we have never had an oppor- 
tunity of dissecting those of Pyrola, we can only confess our doubts candidly, and our regret at being obliged to leave 
the subject of dispute, for the present, undetermined. 
Monorroreg# are readily and satisfactorily distinguished from Ericex by their peculiar habit, winged seeds, and 
minute embryo placed at one extremity of a fleshy albumen. 
EXPLANATION OF THE Prats. 
1,2. Flower in different positions. 3. Thesame taken from the Calyx and laid open. 4. Stamens Surrounding the Ovarium. 
5. Ovarium. 6. The same divided transversely. 7. Style and Stigma. 8. Anthers closed. 9. The same burst. 10, Pollen, 
Il. Capsule. 12. Transverse section of the same. 13. Seeds, natural size. 14, 15. The same magnified. 16. The same di- 
gee Ver enlly, showing the position of the Embryo: Ut Nucleus, showing the spongy substance which connects the outer 
and inner surfaces of the Testa. 18. Embryo separate. 
