keys to the vascular plants of east texas - Botanical Research ...

434 ALLIACEAE/ALLIUM
8. Plants flowering late summer and fall; perianth segments deep pink to red; stamens
exserted, longer than the perianth; species of prairies, usually in calcareous areas, in East
TX known at present only from Brazos, Dallas, Lamar, Polk, and Van Zandt cos. _________ A. stellatum
8. Plants flowering in spring; perianth segments pink, lavender, purplish red, or white; stamens
not exserted, shorter than to ca. as long as perianth segments; species of various
habitats and soils, including some widespread in East TX.
9. Bulb coats lacking fibers that persist as a conspicuous net-like structure enclosing
the bulbs; bulbs with a few short-stalked basal bulblets; perianth segments white or
pinkish; TX endemic known only from extreme sw part of East TX and adjacent South
TX Plains ____________________________________________________________ A. elmendorfii
9. Bulb coats with fibers that persist as a conspicuous net-like structure enclosing the
bulbs; bulbs without short-stalked basal bulblets (except in A. runyonii); perianth segments
pink, lavender, purplish red, white, or greenish yellow; including species widespread
in East TX.
10. Perianth segments remaining spreading after flowering, becoming dry, papery
and rigid; spathe usually divided into 2–3 separate or partly united involucral
bracts, each with 1 nerve___________________________________________ A. drummondii
10. Perianth segments either shriveling or, if persistent, then becoming urceolate;
spathe usually divided into 2–3 separate or partly united involucral bracts, each
with 3–7 nerves.
11. Perianth urceolate, permanently enclosing the capsule, the perianth segments
5–11 mm long; net-like structure enclosing bulbs usually very coarse; plants
rare, if present, in East TX.
12. Bulbs at flowering time with a cluster of short-stalked basal bulblets;
perianth segments white with pinkish midribs, fading pink, 5–7 mm long;
pedicels ca. 2 times the length of perianth in full flower; species limited
to extreme s portion of East TX if present ___________________________ A. runyonii
12. Bulbs at flowering time without basal bulblets; perianth segments deep
rose or rose-purple, fading purple, 7–11 mm long; pedicels ca. equal in
length to perianth in full flower; species of extreme n portion of East TX
if present _____________________________________________________ A. perdulce
11. Perianth campanulate or urceolate-campanulate, ultimately withering somewhat
and exposing the capsule, the perianth segments 4–7 mm long; netlike
structure enclosing bulbs fine or only moderately coarse-meshed; including
plants widespread in East TX.
13. Perianth usually white (rarely pink); plants of the Post Oak Savannah and
westward _________________________________________ A. canadense var. fraseri
13. Perianth usually pinkish or lilac; plants with distributions various.
14. Pedicels filiform (= thread-like) or nearly so; leaf blades narrower than
flowering stem, 0.3–2 mm wide; plants of Pineywoods and n Gulf
Prairies and Marshes w to East Cross Timbers and e Edwards Plateau
__________________________________________ A. canadense var. mobilense
14. Pedicels stouter; leaf blades narrower to broader than flowering stem,
0.5–7 mm wide; plants of n part of Blackland Prairie w to Rolling Plains
OR extreme s part of East TX and to the s.
15. Umbel with 25–60 flowers; flowers with sweet hyacinth scent;
n part of Blackland Prairie w to Rolling Plains ________________ A. canadense
var. hyacinthoides
15. Umbel with 5–25 flowers; flowers � scentless or slightly fragrant;
extreme s part of East TX and to the s _________ A. canadense var. ecristatum