1464 



PTERIS 



9. tT6mula, R. Br. Lvs. 2-4 ft. long, on polished 

 chestnut-brown stalks; iipper pinnae simply pinnate, 

 lower often much compound: sori copious, sometimes 

 filling up the whole segment except the rachis. Australia, 

 New Zealand. — Many forms occur in cult, as var. Smith- 

 iana (P. Smithii. Hort.), variegita, etc. 



3013. Ptcris Cretica. ' 



10. scabirula, Richard. Lvs. 12-18 in. long, on brown- 

 ish scabrous stalks, lanceolate-ovate in outline, tripin- 

 nate or quadri-pinnatifid throughout; rachis flexuous, 

 scabrous: sori at maturity covering nearly the entire 

 surface of the narrow lanceolate segments. New Zea- 

 land. 



11. biaorlta, Linn. (P. mn'jtma. Baker. P. nemorilis, 

 Willd.). Lvs. 15-aO in. long, with a terminal pinna fy-d 

 in. long cut into narrow round-pointed divisions on 7-10 

 pairs of similar lateral ones, the lowest pair bearing a 

 fork on the lower basal side. All tropical regions.— 

 Habit very like P. quadriaurita, from which it differs 

 chiefly in the venation. Var. crist&ta (P. maxima, var. 

 cristdta, Hort.) is a cult. form. 



12. WalUclii4na, Agardh. Lvs. tripartite, with the 

 lateral divisions again forked, the central one reaching 

 2 ft. long, with numerous lanceolate sessile opposite 

 pinnules, cut again into numerous narrow lobes one- 

 eighth in. wide. India, Japan and the Philippine Islands. 



13. leptoph^Ua, Swz. Lvs. deltoid, 9-12 in. each way, . 

 on straw-colored stalks ; upper pinna simple, those 

 below piunatifid to awinged rachis, the lowest similarly 

 bipinnatifld at the base; veins fine; sori not reaching 

 the tips of the segments. Brazil. 



Tho f(>llo\yine are mostly synonyms and trade names that 



■Mil,.! M n iiiited for by the writer: P. adiantoides.—P. 



- ' i'tt'ridium.- P. Chinen»i8 is possibly a var. of 

 I /'. ijeranifhlia is a species of Doryopteris.— F. 



.■(.,.'./ 1 , ,;,.;t liastata.— p. palmAta possibly referable to 

 I ),,, \ ,,;,', r - - /', plumbsa.—P. regina.—P. Siebotdii.—P. Suor- 

 drdii-P. Wimsetli. l M. UndEKWOOD. 



PTEKOCAKYA (Greek, pteros, wing, and l-arya, nut; 

 referring to the winged nuts). JuglandAcetf. Orna- 

 mental deciduous trees, with large, alternate, pinnate 

 lvs., rather inconspicuous greenish fls. in pendulous 

 catkins, and long, pendulous racemes of small, winged 

 fruits. The three cultivated species are hardy as far 

 north as Massachusetts, except some tender varieties of 

 P. stenoptera. They are handsome trees of rapid growth, 

 with graceful dark green foliage, decorated in summer 

 and fall with the long, drooping racemes of light green 

 fruits. They thrive best in rich and moist soil, but also 



PTEROCARYA 



grow in drier localities. Propagated by seeds sown in 

 fall or stratified, and by layers and suckers. 



A genus of about 7 species in the Caucasus region, 

 China and Japan. Branches with lamellose pith : lvs. 

 odd-pinnate, with almost sessile Ifts. : fls. monoecious, in 

 pendulous catkins, appearing with the lvs.; starainate 

 catkins rather dense, lis. consisting of 3 connate bracts, 

 1-4 sepals and 6-18 stamens; pistillate catkins slender, 

 the 1-celled ovary enclosed in a connate involucre elon- 

 gated into a 4-toothed beak, .stigmas 2: fr. a small 1- 

 seeded, winged nut, 4-celled at the base. In germination 

 the 4-lobed cotyledons are borne above the ground and 

 become green, while in Juglans and Hicoria thev remain 

 inclosed in the nuts. 

 A. Winter-buds naked, usually several in each axil. 



fraxinifdiia, Spach. (P. Caucdsica, C. A. Mey.). Tree, 

 lu *io It., with spreading branches, often rising in several 

 stems from the ground: lvs. 8-15 in. long, with glabrous 

 terete rachis; Ifts. 11-25, oblong to oblong-lanceolate, 

 acute or acuminate, serrate, pubescent only in the axils 

 of the veins beneath, 2-4 in. long: stamens 10-lC: fr. 

 with semi-orbiculate wing, about % in. broad, in racemes 

 t(. IS ill. long. W.Asia. Gn. 34, p. 219. G.C. HI. 4:381. 

 - P. Siiaehidtia. Lav. (P. diimnsa, Lav.), is hardly dif- 

 ferent, except that it is more shrubby and tender. 



stendptera, DC. (P. Sinensis, Hort. P. Jap6nica, 

 Hort.l. Fig. 2013. Tree, similar to the preceding: lvs. 

 6-12 in. long, with the rachis winged and pubescent be- 

 neath; Ifts. 11-21, oblong, acute, serrate, pubescent be- 

 neath on the midrib, 2-4 in. long: stamens 6-10: fr. 

 with oblong or oval-oblong, usually upright wings di- 

 verging at a narrow angle. China. — This is a variable 

 species, and the varieties are of different degrees of 

 liardiness. Tlie form cultivated in the Arnold Arboretum 

 has proved as hardy as the preceding species. 

 A\ M'^tnier buds covered uilli 2S dark brown, large 

 Hcrlet, falling off early in spring; accessory 

 buds uatitiiig. 



rhoif61ia, Sieb. & Zucc {P. lorbifdlia, Sieb. & Zucc. 

 P. larigAta, Hort ). Tree, attaining 80 ft., with spread- 

 ing branches, lvs. 8-15 in. long, with terete-pubescent 

 or almost glabrous rachis; Ifts. 11-21, oblong or oblong- 

 lanceolate, acuminate, pubescent on the veins beneath 



2013. Ptcrocarya 



{X 1-5). 



or almost glabrous, 2-1 in. long: fr. with a broad 

 rhombic wing, about 1 in. across. Japan. S.Z. 2:150.— 

 This species is an important forest tree in Japan and 

 has proved hardy at the Arnold Arboretum. 



Alfked Rehdeb. 



