492 



Cruciferae; Droseraceae 



1. Erysimum cheiranthoides L. var. japonicum H. 



Boiss. E. japonicum (H. Boiss.) Makino ^Ezo-suzu-shiro- 



so. Erect biennial, uniformly clothed with appressed 2- or 

 3-branched hairs; stems 50-100 cm. long, densely many-leaved, 

 terete, obsoletely striate, often slightly purplish red near base, 

 simple or short-branched above; leaves membranous, ascend- 

 ing, linear-lanceolate, 4-6 cm. long, 6-8 mm. wide, obtuse, 

 gray-green, sessile, subentire, slightly recurved on margin; 

 racemes rather densely many-flowered, pilose, the pedicels 



oblique, 5-7 mm. long; flowers 4-5 mm. long; sepals rather 

 densely pilose, 2-2.5 mm. long, obtuse and scarious at the 

 apex; petals cuneate; siliques erect, obtusely 4-angled, sparsely 

 pilose, 12-15 mm. long, about 1 mm. across, the valves obmse, 

 1-nerved; style very short, the stigma distinctly discoid, dilated, 

 obsoletely 2-lobed; seeds about 15 on each side of a white 



membranous septum. By the sea; Hokkaido (Tokoro in 



Kitami) ; rare. The typical phase occurs in the temperate 



regions of Eurasia and N. America. 



Fam. 99. DROSERACEAE Mosengoke Ka Sundew Family 



Perennials or rarely annuals, mosdy terrestrial or rarely aquatic, usually glandular-hairy; leaves circinnate in bud; stipules 

 sometimes absent; flowers solitary or in racemes, bisexual, actinomorphic; sepals 4-5; petals as many, free; stamens 4-5(-20); 



ovary I-locular; carpels 3-5; styles 3-5, the stigma simple or lobed; fruit a capsule; seeds many or few; endosperm copious. 



Six genera, with more than 100 species, all insectivorous. 



lA. Terrestrial; leaves alternate or rosulate, entire, with glandular hairs on upper side; flowers in racemes 1. Drosera 



IB. Aquatic; leaves verticillate, with sensitive hispid hairs; flowers solitary 2. Aldrovanda 



1. DROSERA L. Mosengoke Zoku 



Perennials or rarely annuals with short rhizomes; stems absent or elongate and leafy; leaves alternate, cauline or radical, circin- 

 nate in bud, with long glandular-tipped brisdelike hairs; stipules absent or scarious, adnate to base of the petiole; inflorescence 

 circinnate while young; flowers in radical or axillary racemes; sepals 4-8, persistent; petals 4-8, white or rose, persistent; stamens 



4-8; ovary superior, free from the calyx; ovules on parietal placentae, many; capsules loculicidally dehiscent. About 100 



species in both hemispheres. 



lA. Stemless, the plants scapose; stipules scarious, adnate to the base of the petiole, lacinlate. 

 2A. Leaves 3-15 cm. long; racemes glabrous or nearly so; sepals 4-6 mm. long, subobtuse or obtuse, as long as to shorter than the 

 oblong capsule. 



3A. Leaves depressed-obovate to depressed -orbicular, abruptly long-petiolate; seeds nearly linear 1. D. rotundifolia 



3B. Leaves linear-oblanceolate or oblanceolate, gradually long-petiolate; seeds lanceolate, impressed-punctulate 2. D. anglica 



2B. Leaves 10-20 mm. long, closely appressed to the ground; racemes with dense minute glandular hairs; sepals 2.5-3 mm. long, acute, 



longer than the globose capsules 3. D. spathulata 



IB. Stems elongate; stipules absent. 



4A. Annual herb, not tuberous; leaves narrowly linear, 4-6 cm. long, to 2.5 mm. wide, the petiole 7-15 mm. long; sepals short- 

 glandular, lanceolate 4. D. indica 



4B. Perennial herb with tubers; leaves transversely lunate, broader than long, 2-3 mm. long, 4-6 mm. wide, the petioles 8-15 mm. long, 

 distinct; sepals laciniate, ovate 5. D. peltata var. nipponica 



1. Drosera rotundifolia L. Mosengoke. Perennial to narrowly obovate, 1-2 cm. long, 3-6 mm. wide. Occurs 



usually with a reddish hue and short rhizomes; leaves rosulate, where the two parent species grow together. 



ascending or spreading, depressed-obovate to depressed-orbicu- 3. Drosera spathulata Labill. D. loureiri Hook. & 



lar, 5-10 mm. long and as wide, abruptly petiolate, with long Arn.; D. burmannii DC, non Vahl ^Ko-mosengoke. Usu- 



gland-tipped brisdelike hairs on upper side, the petioles 3- ally reddish perennial with very short rhizomes; radical leaves 



13 cm. long; scapes 6-30 cm. long, glabrous, the inflores- rosulate, rather many, spreading, obovate-spathulate, 10-20 



cence racemose, terminal, few-flowered, one-sided; sepals nar- mm. long, 2.5-3.5 mm. wide, rounded at the apex with long 



rowly oblong, with short glandular-hairs on margin; petals gland-tipped brisdelike hairs on the upper side, cuneate and 



about twice as long as the sepals, 4-6 mm. long; styles 3, the decurrent to a rather broad short-petiole; scapes few, 5-15 



stigma 2-parted. June-Aug. Wet places in mountains; cm. long, slender; flowers few to more than 10, in a terminal 



Hokkaido, Honshu, Shikoku, Kyushu; rather common. unbranched, one-sided glandular-hairy raceme; flowers about 



Temperate to cold regions of the N. Hemisphere. 4 mm. across; sepals lanceolate; petals rose, 1.5-2 times as 



2. Drosera anglica Huds. D. longifoUa L. pro parte; long as the sepals; style 2-parted, the stigma capitellate; cap- 



D. intermedia sensu auct. Japon., non Heyne Nagaba-no- sules 1.5 mm. long; seeds minute, fusiform, obtuse and mu- 



mosengoke. Usually reddish perennial with slightiy elon- cronulate at both ends. June-Sept. Shaded places in wet 



gate rhizomes; leaves erect, 2-4 cm. long, 1.5-4 mm. wide, bare soils in lowlands and foothills; Honshu (Rikuzen and 



rounded at apex, gradually narrowed to the petiole; scapes southw.), Shikoku, Kyushu; commoner near the sea. 



10-20 cm. long, the inflorescence terminal, racemose, one- Ryukyus, Formosa, China, to s. Asia and Australia. 



sided; petals 5-7 mm. long, white; seeds lanceolate, obtuse at 4. Drosera indica L. D. makinoi Masam. Nagaba- 



both ends. July-Aug. Bogs; Hokkaido, Honshu (Oze in no-ishi-mochi-s6. Glandular-hairy annual; stems 7-15 cm. 



Kotsuke); rare. Bogs in the colder regions of the N. long, loosely leafy; leaves narrowly linear, 4-6 cm. long, 2-2.5 



Hemisphere. mm. wide, gradually narrowed to a filiform point, with long 



Drosera X obovata Mert. & W. Koch. Sajiba-mosen- gland-tipped brisdelike hairs on the upper side, the petioles 



GOKE. Hybrid of Nos. 1 and 2; leaves broadly oblanceolate 7-15 mm. long, as wide as the lower portion of the blade. 



