Part 106 (1/2)

12. Calluna. Corolla bell-shaped, 4-parted. Leaves minute, opposite, imbricate.

Tribe IV. RHODODENDREae. Fruit a septicidal capsule. Corolla deciduous.

[*] Anther-cells opening by a hole or c.h.i.n.k at the top.

[+] Flowers not from scaly buds; the bracts leaf-like or coriaceous.

13. Bryanthus. Corolla ovate or urn-shaped. Leaves narrow and heath-like.

14. Kalmia. Corolla broadly bell-shaped or wheel-shaped, with 10 pouches receiving as many anthers. Leaves oblong or linear.

[+][+] Flowers developed from large scaly buds, the scales or bracts caducous.

15. Menziesia. Corolla globular-bell-shaped, 4-toothed. Stamens 8.

Leaves deciduous.

16. Rhododendron. Flowers usually 5-merous. Corolla bell-shaped or funnel-form, lobed or parted, often somewhat irregular. Leaves deciduous or evergreen.

17. Ledum. Corolla regular, all 5 petals nearly separate. Stamens 5--10.

Leaves evergreen.

[*][*] Anther-cells opening lengthwise. Leaves evergreen. Bud-scales firm and persistent.

18. Leiophyllum. Corolla of 5 separate petals. Stamens 10, exserted.

19. Loiseleuria. Corolla deeply 5-cleft. Stamens 5, included.

SUBORDER III. Pyroleae. (PYROLA FAMILY.) Calyx free from the ovary.

Corolla polypetalous. Anthers extrorse in the bud, opening by pores at the base (inverted in the flower). Seeds with a loose and translucent cellular coat much larger than the nucleus.

Tribe I. CLETHREae. Shrubs or trees, with deciduous foliage (in ours).

Pollen-grains simple. Capsule 3-celled.

20. Clethra. Sepals and petals 5. Stamens 10. Style 3-cleft at the apex.

Tribe II. PYROLEae. Herbs or nearly so, with evergreen foliage.

Pollen-grains compound. Capsules 5- (rarely 4-) celled.

21. Chimaphila. Stems leafy. Flowers corymbed or umbelled. Petals widely spreading. Style very short and top-shaped. Valves of the capsule smooth on the edges.

22. Moneses. Scape 1-flowered. Petals widely spreading. Style straight, exserted; stigma 5-rayed. Valves of the capsule smooth on the edges.

23. Pyrola. Acaulescent. Flowers in a raceme. Petals not widely spreading. Filaments awl-shaped. Style long. Valves of the capsule cobwebby on the edges.

SUBORDER IV. Monotropeae. (INDIAN-PIPE FAMILY.) Flowers nearly as in Suborders 2 or 3, but the plants herbaceous, root-parasitic, entirely dest.i.tute of green foliage, and with the aspect of Beech-drops. Seeds as in Suborder 3.

[*] Corolla monopetalous; anthers 2-celled.